My advice, which is pretty much the same thing you hear from every shounen anime: "DON'T GIVE UP!"
Someone out there will surely like your stories, also if there's an issue with your story, simply discuss it with someone close to you. Some one who can help you with editing. That was what helped me with my story, otherwise I would have abandoned it a long time ago.
As for what i do to keep retention to my comics? I have no idea. I just simply draw and post my comic as early as possible and leave the rest to luck. Although, I try my best to reach out to people who might be interested. I'm not really good at advice, but I hope you found this info useful.
Here's my comic, hope you like it.
P.S: I'm just as nervous as you are. But the only solution is to keep trying. If after maybe 3 months, nothing improve. You'd have to consult the internet for answers. Places like quora or youtube are my personal picks.