Suggestion on piece to learn (while I look for a teacher)?

[sarab]

It's been a while since I posted anything. I have been juggling classical guitar and piano since early this year - classical guitar won for a while because of recitals and a master class, but now I want to give piano more attention. I have been working on piano a little bit and have begun playing some of the Bach Two-Part Inventions (#1 and #2) as well as some Bach from an early intermediate level book that I had when I was younger and playing. I wanted to get suggestions on some other stuff that I could work on while looking for a teacher. I love Bach (play it on guitar too), but really want to branch out to something different.
I apologize that this has more or less been asked before. I do have some other information and wanted to get more options. I appreciate it -

[quantum]

Chopin - some easier Preludes, Mazurkas

[ako]

Have you ever tried any Bartok? For intermediate levels, you might try Sketches, Op. 9 or Mikrokosmos Vol. 4/5 or the Rumanian Folk Dances.