Hi
I've learnt the whole sonata , and it is really wonderful. I think you should also play the second and third mvts.
First movement main difficulty: some cross hands, some runs at the end, and in general it is difficult if you play it at the Presto tempo usually pianists do in their recordings . But you can play it a little bit slower. I used to play it at 190 mm. Try to relax wrists and fingers in the runs.
People even not very used to classical music (family, friends) use to love this mvt. Wonderful and unforgettable first theme.
Second mvt is really beautiful. It is the easiest of the three.Enjoy it. It is very romantic and speaks by itself. I find the first change to major key and the "echo" ending also unforgettable.
Third mvt has one main difficulty: crossed rythms (three against four, and also triplets against four where the first note is a silence). This mvt is also rated grade 8. This one should be played really vivace. I never reached this speed (I get bored before it), but it would have been worth .
Enjoy learning this work, you wont regret it.
J.