i am an adult, picking things back up after many years, 25+. I had 2 years under my belt, so i knew the basics. My teacher started me on clementi sonatas, then i sort of chose on my own fur elise, moonlight sonata, and chopin nocturnes. what i learned was that i was trying to jump too quickly, and while i could play the notes to the chopin nocturnes, my newness to the piano showed tremendously. let's just say, technically speaking, my skill was lacking in ALL the above. So, my teacher suggested burgmueller, czerny, and hannon, and of course scales. after just 3 months, there is such an improvement in my skill level, i actually play with more confidence. I actually feel that i have the music in my hands. My playing is much more consistant, which is more than i can say for 3 months ago. I could never know what was going to come out of my fingers. sometimes i played evenly and precisely, and sometimes (more), i played unevenly, and off tempo, and choppy. I sounded like a 2nd year student playing chopin, instead of like my favorite artist's playing chopin. my teacher assures me that all those artists have been playing for years and have grown and matured with those pieces in their repetoire. I can only hope that one day i will play like that.
totally classics