All Chopin studies have built in difficulties. After all, they were written for students building technique. I would start with the slower op. 10. no 3 or op. 25 no. 1. Do a lot of slow practice. Have fun.
Start with the easiest ones (i.e., 10/2, 25/6, 10/4) then once you've mastered those you can start some of the harder ones.
Any tips for the speed of these? Besides, I can't really practice, you know. My piano only has 61 keys.
yo, are you mentally retarded? these are the HARDEST
Why not just play the one that sounds the most appealing to you?
I think the Black Key Etude (10.5?) and Revolutionary are easier than they sound, and they are more fun to play than 10.3 and 25.1 imo.
As I said, my keyboard only has 61 keys. And my favorite is the "Winter Wind" etude.