[powersnail]

How is it gatekeeping? Nobody is actually capable of stopping you from doing what you want to do. They simply don't agree with you.

Many teachers can teach once a month. Many music are free on IMSLP, musescore, etc. There are cheaper ways to get started than what you have been apparently told.

My main objection to using an app are 1) it doesn't correct your posture which might lead to injuries in the long run (though not a concern if you don't play frequently) 2) it usually takes a lot longer to reach the level you have in mind. Learning from a teacher actually saves time.

But, if you just want an interface to DAW, I think an app is fine, since there is no need for phrasing, or timing, etc. You'll probably be fine even without the app.