@ceruleanbagel The biggest problem with any app or online instruction is that it can't see what you're doing. There are physical holes to step in at the beginning that can really hold you back. If you can get even just a few sessions with an experienced teacher who can guide your physical approach, everything else will come much more easily.
@ceruleanbagel In that case, whatever inspires you to play! Generally, things that lead to you songs will sustain better than things that are focused on drills - there's a way of choosing song-based material that still can create a progression of learning. The occasional technical drill is ok, but making music is more inspiring! The first rule is have fun - no one calls it working music - play!