Hey! Here's some tips I've found help:
-Updating is really important. Try to be consistent, and just don't stop updating. The most important aspect of a comic (even above plot or art quality, imo) is the fact that it updates. Even just once a week is good!
-Post on multiple sites. I recommend using Tapas, Webtoons, and Comicfury. You could look up some other apps if you like, but these are the ones I find most reputable in the English speaking sphere.
-Definitely try social media like Twitter and Instagram (please be aware the Instagram algorithm is horrible and you may have a really hard time with it, everyone does, Twitter's is a bit easier) but please do try art focused sites like Deviantart, Furaffinity, Newgrounds, or good 'ol Tumblr. These places are still where folks go to find art!
-Tag your comics carefully, and try improving your SEO with a strong summary for your comic and file names.
-Work on developing a strong thumbnail and strong story summary. These things REALLY help a lot more than most folks realize, I think!
-Do art trades/collabs/guest comics with fellow artists. Getting exposed to someone's audience by drawing their characters in a cute little comic is a tried and true method of cross pollination. It's worked wonders for me!
-Thank your audience when it's appropriate. Seriously! Just thank the people who are there, it encourages them to keep coming back.
Other, more general advice:
-Optimize your work flow and address any mental blocks that might be preventing you from making art as easily. Seriously, therapy can help a lot in terms of enjoying making comics more and having a better work ethic. This comes from experience!
-If you're having a hard time keeping up with a comic, or even finishing one, try thumbnailing out a 10 page comic, and then finish that. If you like the way that feels, do more. Try 20 pages, then try 30.
-If comics feel like they suck to work on and you don't like it... try making a visual novel. I'm serious. I make visual novels alongside my comics and it's very rewarding. They pull from a LOT of the same skillset and I've seen lots of folks make the transition from comics into visual novels and never go back. You could really enjoy them!
-Remember that comics and story making are for fun and your enjoyment. Getting comments back isn't always the goal, and sometimes having a dedicated, small fanbase, is better than a bigger one. Again, I speak from experience.
Good luck!