I've wanted to post some prototypes of games and art recently, and while I do have a bit of a following, I haven't gained a following that is dedicated. The only place where I do have an audience is on other people's Discord servers, but it doesn't help a lot since nobody cares who you are in those places. I think having a small following would be good to start off with when I do start doing bigger projects. I'm thinking starting a smaller project that I'm capable of doing without taking too much time can help. Horror games get a decent amount of views and while I do enjoy some of the games, that's just isn't my thing, and I would like to start building up some concepts, ideas, and characters, but it just doesn't seem like I would get a following by only presenting some original concepts and characters at this stage. What should I do about this?

Be patient. Don't ask for much. Interact with people both Devs and players. Be consistent and increase your following slowly over time. Taken me almost 3 years to get 166 followers 

If your not entering jams here, consider it. Every jam has a focus with a theme and attracts people with similar interests

Patience and consistency does also work I think. I update my youtube weekly and my game development monthly for years. Like Hodslate said, its slow and can feel like you're just throwing stuff out to into empty universe. sometimes we see "big hit" and this that is what success looks like, but I think for many smaller creator who is just looking for some engagement, this expectation is more feasible.

welp, that's the trade-off with creative and commercial success. Sometimes there's a sweet spot between what you want to say and what others want to hear. But most of the time...it's a treacherous forest.  But worry not for there is people who you can engage with, game jams, groups, channels, all sorts of people in places living loving and learning.