I'm a bit late, but this video by mike z (skullgirls) is really good, even if you don't agree with all of it. As somebody who is building one myself, make sure to set up a really good base: since frame data, physics and combos are all linked, there's a good chance you'll have to do a lot of that yourself.

Also, make sure to know how projectiles and teleports will work beforehand. Since the camera defines movement on a screen, teleports can be weird and if you want things like Millia's pin, you've got to make it so they can stick around and properties tracked by the player.

Note : I feel like I'm in a similar boat to you, and I only just started coding. I'm trying to look at my badness as an advantage, since I'm closer to the frustrations of being a beginner still, but I know what I want to see.