Hiya!
Honestly, one bit of advice I could give on that that probably many others would agree on is to tag your work like crazy if you’re really wanting your work to be seen, especially if it happens to be of more widely known characters!
Another thing I see folks commonly do is intentionally make art of more widely known characters, and even draw for folks that may happen to be more widely known. From what I’ve seen (and seemed to have experience myself with FNAF), things like that tend to be more effective!
Overall, though, keep at the art on a regular basis! It is wonderful to be as consistent as you can with producing more work!
Don’t be afraid to post a lil more than what you may post on average, but also try to keep it at an appropriate quantity (so to not stress or overwork yourself)! <3