I would definitely recommend finding a friend or two who is reliable, honest, and is already familiar with your work. Don't get help from those friends who always go "OH YEAH THIS IS AWESOME" because the thing is, while they think they're being helpful, we know they aren't (not saying this is a bad thing, they might just not know how to critique or know that you're looking for valid criticisms aside from because-i'm-your-friend praise). I know I have a few friend who read Time Gate and I know I can always turn to them to bounce ideas off of or get feedback from regarding my work
Honestly though, it can be tough to get good critiques when you're still in the drafting stage. When someone critiques your work at that stage, 9 times out of 10 the answer is "well it isn't DONE yet". Unless you've got a friend who knows what to look for and critique (ex. if I were looking at someone's draft page, I would know to critique on the structure of the page, the panelling, the camera angles, the placement of speech bubbles, etc. vs. critiquing on the general "appearance" of the comic because no, it's not done yet so you can't really say anything about the visual aesthetics to the art; it's more about the mechanics and functionality and ease of reading.)
So yeah! I know a lot of review people won't critique unfinished work (for a lot of the reasons I listed above) but if you can find a friend or two who would be willing to be honest and read through your stuff and give you an honest opinion on what they like/don't like WITHOUT sugarcoating it for the sake of friendship, you'd be all set (or even find a writer's group or a place you can go to with people you can consult who have an eye for that sort of thing).