This is a tricky piece.
View DEMO on YouTube: https://youtu.be/DC-ZQHZJbB0
Take your time.
Take note of the finger recommendations and the picking direction.
You can of course adapt the finger or picking choice.
If you do, make sure it is for a good reason and works better for you.
TIP: Take one little piece or bar and add it to something that you already do.
Bar 1 is a little twisty lick that ascends through the C Major (AKA A minor) scale.
Bar 6 introduces a snaky hammer-on/pull-off idea. Make sure it is same speed as rest of song. From here it repeats from the start of main section and then skips to bar 7 instead of 6. Bar 7 is difficult. Adapt it if you need to.
Bar 8 is the same idea as before but then next chord up the scale. The piece starts with Am, so this bar uses B diminished.
Bar 12 descends through the scales chords as arpeggios. Instead of Em, an E is played. a common trick and a familiar sound, too.
Bar 13 then ascends through the scales chords as arpeggios, but using a different pattern. After the G, a bridging chord is used to get to the next one. This bridging chord is G# diminished. Diminished chords are great as a way of introducing chromatic chord lines.
Bar 14 ends the lick changing the chord from Am to A major. Why not eh? It then plays the A Major arpeggio using the C chord shape. In other words, using the C chord shape, but moved up the fretboard so that it is in the key of A