From what I've heard MIDI controllers are not good for learning piano. You really want weighted keys and a full 88 keys otherwise you won't learn the right habits or build finger strength.
(I learned on a physical piano in person, so I can't speak personally about learning on a MIDI controller, but it sounds plausible to me.)
(I learned on a physical piano in person, so I can't speak personally about learning on a MIDI controller, but it sounds plausible to me.)