Start with the 1st and 3rd finger, choose a string and hammer-on and pull-off starting from the first fret all the way to the 12th fret! Try to do all six strings!! Once it starts burning Stop!!! Rest for awhile and try again!!!!!Then try a different combination of fingering(1st and 2nd; 1st and 4th; 2nd and 3rd; 2nd and 4th etc.) Shoot for a clean and articulate sound!Start slow and gradually increase speed as your fingers get stronger!!!! Happy forearm burning!!!!