pretty good
i'm a big fan of chopin's nocturnes so i may be a little critical. one thin you should try is dynamics, especially with the repeating base line, maybe vary it a bit more. (lol like i'm one to talk, just listen to my "a hopeful heart") my favorite part was actually the end cause thats when it truly got unique, straying away from a common theme can be good every once in awhile, a key change here or there or a tempo change or two, also, at around 1:07 i'd think it would sound cool if you did the scales and arpegios like you did, but at a constant flow which thn you could break back into an earlier pattern then do what you did at the end, and mke it longer, the ending is cool keep it goin, ya know? but all thats just my opinion, sounds great otherwise, especially for a first song, believe me i know the feeling. good luck in the future ;)