u/Fancy-Band-6378

I'm trying to teach myself differential equations over the summer but as I'm looking through difference sources (youtube playlists, in browser textbooks, ect.) I'm noticing a pattern where they will vary in content a lot from source to source. For example, some might cover methods of solving that others wont like exact equations and after laplace transforms they each seem to go down different roads like one will go on series methods, another with go over systems of equations.

I'm very nervous about using one source and missing out on stuff from another and cant find a source that just has everything. Is there another source that does cover everything or is there a good reason that I don't need to be worried about this?

I just finished calculus 3 and ending on stokes and divergence theorem really hyped me up and now that I'm done with it, I have all this energy and excitement from it and I have the itch solve problems or learn more but I'm not sure what. I'm thinking something like mechanics, or electrodynamics textbooks? Or, are there more integral 3d geometry type theorem stuff to sink me teeth into?

I'd really appreciate some direction to put this energy into. Thanks!