I think it's good. You have musicality and a nice tone. But (there's always a "but" ) you must work very hard. I'm not going to talk about the possibilities of being a concert pianist (as you asked in the other thread) because I don't think it's now the moment, having in account that even for many really accomplished pianists it's very difficult or impossible to reach. First step, playing extraordinary well the piano. With such a high aim as you pretend (becoming a concert pianist), there's no second step without fulfilling the first.Concrete advices for this piece:- The exposition of the themes (Lento) is nice.- Revise the rhythm of the octaves on the left hand. The triplets (bars 39. and simile) must be listened and understood very precisely. - Più moderato (bars 52 and later). It's moderate in relation with the tremolo and octaves passage but it's not that slow.You are only seventeen. You have many room and time to improve.I encourage you the continue. My advice is working very hard, if possible with the supervision and advice of a good teacher. Thinking on it again, without a good teacher I don't think it's possible to reach nothing important in the piano. Of course, working is a key factor but must be done intelligently, not exhausting for nothing.Hope this helps. Regards