Oh, thank you for your advice everyone, I guess it was fortunate to have started on the op. 10 no. 3 etude. So, I will probably finish the no. 3 etude first, any suggestions on the next etude to be learned? I only had an interest to start on Chopin's Revolutionary etude because, I read somewhere that it is not too difficult to start from that etude. Of course, I did not analyze the piece yet, still finding a copy in local music stores.