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?
If anything tilts towards becoming better/advancing your skills as a musician and pianist or perform for other musicians to create any sort of reputation: I would play less technically challenging repertoire than La Campanella and less challenging pieces in terms of touch and other more "musical" aspects, that requires experience at the piano to some extent.
Don't ever go back so far that you think it's boring. But there are pieces that will be challenging, even though they don't look very hard. Nocturne no 20 is a good start I would say, even though every piece will be played differently by a professional, advanced, intermediate or a beginner. When I first started playing the piano I was looking for challenging pieces aswell, and I played alot that was "above my level". It didn't occour to me at the time that it would harm me a few years from then.
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.