not a stupid question at all. youre not born knowing how to play guitar. lol
try this on the top E string....rest your first finger on the 7th fret, your ring finger on the 10th fret, and rest your first finger, on the picking hand, on the 12th fret.
start out slowly...press your first finger on the 12th fret, then pull off to 7, then hammer on with your ring finger, then put your tapping finger back on 12. it should go like this...h12-p7-h10-h12. start out slow then progessively go faster.
thats just a basic version of it. later you can add in different notes and parts of scales.