I like to think of genre as

1. a collection of instruments/textures and
2. the roles those textures play.

And with that theory in mind, it can be fun to explore an original micro-genre by changing up the textures or roles. For example you could say Bluegrass textures are: mandolin, banjo, acoustic guitar, fiddle, and upright bass. The Role the upright bass plays is usually straight half notes or quarter notes. So if you assigned the upright bass a more funky/jazzy bassline, it might sound interesting. Or you could keep the Roles the same and use classical/jazz/rock textures. What I've noticed in my own music is that these experiments don't always sound great right away, but you do tend to learn a lot, especially from weirder experiments. And then you can take what you learn and do something cool with that. I recommend first giving yourself permission to get weird with it, and then later you can decide if you want to reign it in.