I can successfully play the first movement and would otherwise consider myself to be at Canada's Royal Conservatory of Music level 8 to 9. (I can play Chopin's Prelude Op. 28, No. 6 with my own interpretation, and I can play Chopin's Nocturne in C sharp minor with difficulty and relying on the publisher's interpretation.) I've recently started studying the 3rd movement of "Moonlight", but I'm noticing that I'm not making much progress - although I am certainly progressing through the first page in the sense that I am playing the correct notes more often than not, I'm not noticing any significant increase in my ability to play new passages - all of the passages I encounter, unless they are similar in form to those I've already seen, I'm just brute forcing my way through.
Are there any studies around my level that might better prepare me to handle the full movement?