I recommend Debussy's "Pour le Piano" - sounds like you haven't played pieces from after 1890, so this would be something new and fresh. It will be challenging but do-able, not nearly as difficult as Chopin's 2nd ballade. A shorter piece, from the same time period, very beautiful with some new challenges for you would be Ravel's "Pavane pour une infante défunte". Another is Ravel's Sonatine.
... I discovered some new pieces I’d like you to ask about their difficulty. Referring to the first scherzo by Chopin, the second, liebesleid by Rachmaninoff, rachmaninoffs sonata op.2 no.36 second version non allegro. Liebesträume, sonetto patrach ( forgot the name ). I gues these are famous? Idk I heard them my first time today