I mean really if you already know the engine some and can set up sprites and camera and player character then you know about 90% or more of what is out there for paper2D. When it comes to paper2D you are pretty much on your own. Since paper2D is considered done from what I can gather they only ever do bug fixes on it and that’s it they aren’t going to continue building on it any longer. What makes things even harder is that there are a lot less C++ tutorials than there are BP ones so most of the stuff you are going to find will be a BP tutorial. But you could literally do the same thing with code as long as you understand everything so those tutorials might still be of some use.
I recommend just finding C++ tutorials either for unreal specifically or just in general because you don’t actually need paper2D it’s just a nice place to start and saves a little time getting a fresh project workable. Once you know how to write C++ decent and know more about the engine you can do whatever you want. That’s when you will really see what I mean about paper2D.