I've been a creator on Tapas(tic) for almost 3 years now, and I've found that there is a lot that you need to know before you can seriously start making comics on this site or other comic hosting sites. Here are some tips that may help you on your journey:
Getting Started
The hardest part of making comics or really anything is simply starting it. Really. You can plan all you want and promise the world, but until you actually start making stuff, you'll never put yourself out there or get any better.
Scheduling
What you may want to do once you've started is put your episodes on a schedule. Be it twice a week or once a day, this can help grow your series and following by developing a sort of subscriber-creator loyalty. If you promise to upload on certain days, readers will start to get into a rhythm with you. Now if you miss a day, it's best to notify what's happening on your profile wall rather than making an update episode. And don't worry if you do, for this site is very forgiving. Just make sure to select that little bell before posting.
Engagement
Tapas and their staff encourages involvement with your comment section, and you should do your best to do so. But of course, don't be overbearing. There is not a requirement to reply to every comment made, so perhaps spend time responding to the most inventive comments or questions. Also, if you are a small-time creator, you can post thank you notes on your new subscriber's walls, or put a broad thank you on your own wall, which is more recommended.
Update Rates
Depending on the type of comic you make, you can update daily or however many times you think you can handle. However, do not update everything you have in one day. Not only will you not show up again on the fresh section, this can also cause "reader burn", where new readers can be overwhelmed by the sheer amount of content they have to catch up on just to be up to date. If you are making a long form comic, a couple of pages per update is better than one page per update or full-length chapters. If you make gag-a-days, it's best to update multiple times a week, not multiple times a day. Bite sized content is usually the way to go for either case.
Feedback
If your comic doesn't get a lot of feedback - likes, comments, shares, etc. - that may not have to do with the quality. Rather, it has much more to do with the reach of your audience. When you start, you may get a lot of views, however it will be only a percentage that will like it, and even less will share it or comment on it. If you want to gain more feedback, you can ask for some in the description. Also, if you want people to be involved in your comic, you may need to do the same with others. Feedback is a two way street, but don't beg for it. It has to come naturally.
Readability
A big issue with comics on many sites is that they are hard to read. Not usually from the writing itself, but more from font and font size. Most people are going to be reading your comic on a mobile phone, so you want to make your text as big and clear as possible. If it's hard to see, you may have to reformat or resize your comic. It will take time, but it can be worth it in the long run.
Popularity
Don't expect to be on overnight success when you start out. Usually, unless you're a genius with your art or make something viral, you will have to build your following brick by brick. Practically everyone who has gotten popular started from the bottom. Sometimes you will get a break by being featured somewhere, but don't count on such a thing to be your path to popularity.
You may also see that some series pop out of nowhere and get featured really quickly. Don't worry about it because it's usually that they have a large following elsewhere. Don't sweat over popularity if you're willing to work hard at growing.
Revenue
This section changes a lot, but there are a lot of new opportunities today to earn something for your creation than there were years ago. If you think you can start making some amount of moola from your comic, consider both the ad revenue program and the tipping program here on Tapas. In order to sign up you do have to be of legal age, but that's usually the way with any form of revenue service. Also, you can link your series banner to whatever other site you want, like Patreon or Gofundme.
Innovation
When you start a series, you'll find some fun and new ways to present your comic. These innovations can make you stick out amongst the crowd, which is very beneficial. Also, don't be afraid to experiment by drawing in a different style, coloring differently, or even switching genres. If it works for you and makes it easier to produce your content, go for it.
Criticism
For anyone out there who wants to make anything, be aware that not everyone's gonna like your content. This is the internet after all, and Tapas just so happens to be a bit on the nicer side. But in time, you might find someone (or many) who will give you a full analysis of your comic and say why they don't like it. Better be prepared now, so that when you do start to receive some negative feedback, you won't let it get to you. In fact, the majority of criticism can be positive or be used to help you improve. Not everyone is out for blood. Just don't take every negative comment you get seriously.
Stats and Subscribers
When you start, you may have the tendency to watch your statistics page in hope that they will grow. Sadly, this is not the best way to spend your time in content creation. If you obsess yourself over how many subscribers and views you get every day, it will waste precious time that you could be spending on making more content. If your content is getting better, so will your following. It just takes time to get there, just not on the stats page.
Subscriber and Wall Etiquette
If you are a small time creator, do not under any circumstances beg for subs or post promotional content on more popular creator's walls. While it may be done in the best intentions, it is considered rude by practically everyone to ask someone to subscribe to you when they don't want to naturally. Do not subscribe to a comic just to have the creator subscribe back. Follow comics you genuinely enjoy or find promising, and others will do the same.
Also, do not spam your subscribers with your wall posts. It's better to post important info there about your series or announcements about future endeavours. Don't just post photos or random things all willy nilly, because less will want to see what is going on if you have something important to say.
Hopefully these few tips can help you start here on Tapas or any other site. Don't be afraid to ask questions or post other tips that you know that can help new creators.