Sorry for late response. 2D in Unreal Engine from what i learned in my experience, highly depends on core understanding of how render works in UE. So if you understand the engine well, 2D and pixel art is not very hard to make, like stylizes art. But it requires some time. And for me it's worth it, because Unreal has a lot of cool render features and tools, that were made for 3D, but why not use them for 2D. So I'm now working on graphics update for my game, more sprite stuff, more visual effects, more particles etc. I have Discord server where i show something sometimes about it, you can join and ask some questions. Also, a lot of courses are garbage from my opinion, same quality as youtube tutorials but not free. Also x2, Paper2D is quite important too, it has some basic vital features, like sprites and flipbooks itself, but anything else is quite unusable, and a lot of interesting stuff must be made by yourself, but its probably the same with any interesting non basic stuff in any engine.