Wow, you took one year to learn what I took seven years to learn... *jealous look*nufan above covered most of the main ones; there's also, in my noob opinion, the Chopin mazurkas (most should be manageable at your level)...
nufan above covered most of the main ones; there's also, in my noob opinion, the Chopin mazurkas (most should be manageable at your level), Czerny Op. 849 (OK, not exactly interesting), the sonatina album (Kuhlau, Clementi, etc.), nearly all Mozart sonatas (except harder ones like #3 and #19), Beethoven's early sonatas (the three WoO sonatas, and the sonatas with opus numbers up to Op. 13 ('Pathétique')), etc. Rachmaninoff's transcription of Rimsky-Korsakov's Flight of the Bumblebee is way easier than it sounds, and anything marked as 'for children' by great composers (like Tchaikovsky) will be manageable and sound great at the same time.For more night pieces like Chopin nocturnes, you may also look into the first movement of Beethoven's Moonlight sonata (though the third movement will have to wait) and Debussy's Clair de Lune. Field is nice too.
Also seems to me that if you have the determination to learn Chopin Nocturnes by yourself, it would really be worth it to get a teacher and really learn HOW to play the piano. You're young and a good foundation could take you so far...If you like Chopin, try the posthumous waltz in a minor and the easiest preludes: 28-7, 28-4, 28-6, 28-20, 28-9
The question to me is, do you want to perform these pieces you are going to learn to a group of musicians or for friends/family who do not judge?Do you want to learn these new pieces to advance in your playing or are you happy with whatever you achieve/ just play for the sake of playing?
However, I havn't heard you play and you might be a musical progeny. How should we know from just writing? I'm just asuming you are an ordinary human being in love with music.
Here are some pieces that you might wanna look at; Brahms op 118 no 3, sounds pretty hard- fits right under your fingers really nice, very comfortable to play.Liszt Consolation no 3, a good start to learn polyrythms which you will find a little bit everywhere. It's beautiful and a very good piece to practice control of touch.Bach prelude and fugue c minor (book 1) good finger technique practice in the prelude, and a good fugue to start with, only 3 voices (I think) and they are all pretty clear, a good introduction to the WTC in general. I generally stay away from introducing people to play Scriabin at such an early level but if you want you can look at some of his preludes from op 11, some are real virtuosic works and are clearly out of alot of peoples league but some are very romantic and beautiful and not so hard to overcome. Pretty short works aswell.Gershwin prelude no 2, if you want something different.