Hi there! I will describe my situation a little before getting to the main point. I took piano lessons when I was 15 almost for a year, but then I stopped 3 years, and recently (like 4 months ago) I have decided to start playing the piano, this time more seriously... and well, i don't have a teacher so i'm trying to teach myself the best i can. I find one of the biggest problems of self-learning is choosing the repertoire, I just pick pieces that I like and try to play them...some times they are too difficult and I drop them for later

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Well, this time I've decided to study schubert's moment musicale Nº3 and I think it's going pretty good but i'm having problems with one thing, I just can't seem to be able to play the consecutive thirds with the right hand that are on the 9 compass right (even) and fast, so I would like to know if anyone knows a good exercise or a good way of improving this kind of thing, of acquiring the skill that its required to play this part, I would really appreciate if you could share it with me

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Thanks!.