Now, we're talking !
So you do have some good repertoire basis. An excellent repertoire (I have the same : that's why it is good

)
It's good that you played some Bach (my favourite composer). It's a very good technique foundation and beautiful music. It refreshes the spirit. Good for the mind. Try the play some of the WTC, it will strengthen your fingers and hand independance, you will need for the Chopin etudes.
Scarlatti's sonatas are excellent for technique too.
Debussy is very good for working on color and tone. You can use this Chopin too.
Chopin's Etude is hard technically, that's obvious. But we must not forget that it's also a piece of music. When you'll play it, you will have to make music with it, so that people listening will moved by the sound of it.
So, how to work on musicality ? Well, Chopin is a romantic. you have to work on romantic repertoire for this.
You can expand your romantic repertoire. T play a Chopin piece, nothing prepares you better than Chopin pieces. But you already have some of these. You can play some other pieces by him, but also some other composers.
Mendelssohn's Songs without words are wonderful pieces. They are very short and intermediate. Definitely in your reach.
So are Grieg's Lyric pieces. He wrote 66 of them. Very intimate piano music. Above the same level as Mendelssohn.
You have one piece by Schumann. There is a lot of piano music by him. Check out the rest of the Kinderszenen. All of it is in your capacities. Check out also Album für die Jugend. These are real gems.
After seeing your repertoire, I can say that prelude (opus 28 no 3, the one I mentionned above in my earlier post) is definitely in your range. My favourite recording are Arrau (Philips), Argerich (DG) and Pogorelich (DG). If you enjoy it, I suggest that you work on it. I t would be a fantastic preparation for the etude.
Remember that Chopin's favourites composers were Scarlatti, Bach and Mozart. He used their pieces to teach his students and to prepare them to play his own pieces. Playing the pieces of these composers can be a help to master Chopin's compositions.
Finally, don't you have a teacher ? He could be a great help and should be the one answering your questions.
This should get you started.
Good luck and have fun !