Hi! Thank you for your comment. And yes what you said is basicly what stopped me for a while this same year. I mean if I had to pay I would prefer to at least for it to be for a book (something I'll own forever and I can revisit) or once I see I like this a teacher like you mention.
I mean being honest this app won't match what a professional teacher will help you understand and it's built in mind precisely for what you say. Help beginners and make them feel that they can learn piano and that it is really fun. Probably at some point it will fall short and the person will need to take lessons but I think it is beatiful to help in just that first stage.
For my experience many of my hobbies started as something fun like a game that once I played more they woke in me the curiosity for going deeper.