If you're starting as an adult, you are not aiming for a career in piano, just going for enjoyment. In that case you have plenty of years to work with. I started at 40, without ever having played the piano, although I had played classical guitar and had done some music theory and ear training. Now, at 55, with a good teacher, I've played lots of Haydn and Mozart sonatas, a couple of Beethoven ones (the early E major, C minor, and the Pastorale) 6 of the 8 Schubert Impromptus, a few Brahms Intermezzi, WTC Book I P&F in C minor, D minor, G major, Ab major, the Revolutionary Etude. I practice a lot, 2 hours a day in the first years and now 3-4. So I feel I can play plenty of very interesting music. On the other hand, I could have developed a good bit faster, I think, except that for the first 12 years I either had no teacher or teachers who didn't take teaching technique to adults seriously. If I'd had my current teacher from the start, I think I could have gotten to this level in 5-6 years instead of 15.