I'd agree with everything that JJ90 says but would also just add that make sure your technique is spot on from the start, even if it feels uncomfortable and like you're not making much progress.

To become proficient at lead guitar you have to play up and down strokes fluently, so try not to cut corners by playing just down strokes because it's easier..I'd also suggest leaving hammering on and pulling off until to can pluck each note individually.

This may take some time to master, but you will be glad you did!!

Shayman