As a former troper..... I don't think it's a good idea to add new tropes if you're not already a troper, or haven't lurked there for a little while. There are a LOT of tropes already, and there's a good chance that whatever trope you recognise in your own series is already on there somewhere. Explore the site! (Or if you're having trouble with something very specific, try the Trope Finder?)
Like, on your page, I see you've listed "sentient robots" as a trope your work has, but Sentient Robots isn't a trope that exists on the site under that name. The tropes on TVTropes are like a language that the community knows well, and not bothering to learn that language and just making up your own words instead is sorta tacky and makes your page look tone-deaf.
Just search the site for "sentient robots" and the Sliding Scale of Robot Intelligence is one of the first tropes that comes up. If you read that page, you can find a link in that trope to the Robot page, and the Robot trope page mentions that the Robot Roll Call page has a very comprehensive list of robot-related tropes. So you'd explore, like this, looking through the different tropes, reading up on the differences, and finding tropes that best fit your characters and story before adding them to your comic's page.
You also have a trope about "gold star lesbians" listed on your page that doesn't seem to be a real trope. I did a search for "lesbians," though, and clicked on the first trope that came up (Hide Your Lesbians) just to see what related tropes it listed, and lo and behold, Cast Full Of Gay was listed there -- a series where most if not all characters are gay -- which seems to be the trope that fits the description you have there!
And then, once you find tropes that fit your comic very closely, you can list them on your comic's page, and you can also go to those trope pages and edit them to add your comic to the listed examples! You'd want to make sure it really fits, and you'd want to make sure it's a trope that it's okay to add examples to (some tropes say that they shouldn't have listed examples, or specific notes like "don't add aversions or subversions to the examples"), and click to edit and scroll down to the examples and add your comic! Make sure to take note of how formatting works, too, since TV tropes has some of its own specific formatting styles.
Look, the thing is, TV Tropes isn't designed as a place to advertise your work -- it's made and upkept and populated by people who are passionate about dissecting and analysing the tropes in media. While there's no rule keeping anyone out -- and when I asked about it years ago, the community assured me that they have no problems with webcomic artists adding and populating their own pages -- still, don't be the guy barging into a community just to advertise your work without caring about the community. Lurk for a while and see how everyone else is doing things; watch some of the suggested tropes in the trope launcher/YKTTW and see which ones are successful and which don't fly and you'll probably have a better idea of how to propose tropes. Learn at least enough tropes to talk about your comic before you start trying to describe your comic with tropes.