Based on self-estimation I place myself around Grade 6, since I have tackled a few Sonatinas, Beethoven's Moonlight (1st mov't), and Rach's "Bumble bee" pretty well. I am a very enthusiastic amateur piano player and I listen a lot to piano recordings.
Unfortunately, I want to play this Etude which is difficult from the beginning. I've got little problem with hitting the notes correctly (as this Etude is one of the technically easier ones of Chopin), but my mind is ground to atoms in the first bars. POLYPHONIC sh*t MAN!!!

This is my first real introduction to playing a composition that's actually for three hands - notice the right hand plays both a melody and harmonic accompaniment, while the left just provides for the bass.
It's not that I will never master it, it's just that my progress is rather slow due to the crappy complexity.
Should I give up? If not, should I
1) Focus on learning it slowly, gradually, progressing only when I have perfected the first few bars, or
2) Never mind mastering it, since if I learn the entire piece by reading it I will eventually perfect it.
What should I do? Thank you.
(Also, I'm tackling an even harder piece, this:
https://vkgfx.com/scores/tatum/tatum__t42.pdf but I'm taking my time on that one. Learning hellish pieces makes me lazy.

)