People can disagree with you all they want about the app. I figured out how to play with both hands at the same time with Simply Piano. To me, that is magical. Also, it's fun. I am using a M-Audio keyboard, which senses speed and was good to get started, and now I feel proficient enough that I want to buy a digital piano. Looking at Kawai, but can't visit a music store showroom because of COVID lockdown.

Maybe in time I will change my mind, but I think it makes perfect sense to use a basic MIDI keyboard to learn the keys and notes while deciding if it is something enjoyable and worth a substantial financial investment.