Watch the Sliding Sweetness online guitar lesson by Peppino D'Agostino from Acoustic Poetica: Fingerstyle Etudes
Sliding from one fret to the next can hurt your fingertips, especially if you've never done it before. The good news is that if you keep on practicing you'll slowly build calluses and everything will become much easier!
In this etude, you'll be sliding essentially from the 5th to the 7th fret of the 2nd string with your ring finger. The only exception is on measure 14, where you'll be sliding from the 5th to the 3rd fret of the 1st string with your index finger. The bass notes are keeping a straight 3/4 waltz tempo.