Want to learn piano as fast as possible? Well, my #1 tip for rapid progress is to solicit feedback. The right type of feedback will be immediate and simple (practical, concrete instructions).
So the best thing for you would be to find a piano instructor as soon as you can. Because you want to know how to do it correctly from the beginning and not pick up bad habits.
If you don't have access to a quality instructor I would recommend listening to as many recordings as possible and studying as many music scores as possible. Combine this with self recording and you'll be well versed in giving yourself correct feedback.