I actually took a look at your comic and I noticed something in your artist note:
and that's it! I didn't even bother to finish this one because that's how much I suck :'^)
I don't know why people think that insulting yourself and your work helps you get attention, but it doesn't. Don't do that. It just shows you don't take your own work seriously and if you don't, why should anyone else? Building a community is a long process that takes a lot of time and effort. Your readers first must be interested in your art, story, that's what catches their attention and your future actions decide if they stay or not. That means you have to communicate with them, keep them engaged, and be respectful. Show you are sure about yourself as an artist and you value time of your readers. It's hard, it's long and tiring, but it is possible to create of community of people that return. It's not that people don't do such a thing, the problem is always on artist's side. I was the same, thinking what could I do to get followers. Later I realised my art and story was not good enough, I started again and changed my behaviour. Started to talk to other artists and things changed.
And yes, you can do fan art, but the fact is people don't come to you for yourself, but the popular thing you draw. In the moment you show them your own thing, they leave, so building a community like that isn't very good way.
If I can recommend you something, it's work on your art, polish it, and show you are confident artist who is willing to take feedback and talk to other people. It's practically the best thing you can do, because there isn't any magic button that will bring people to you.