10h12. In this h means hammer on.Hit the 10th fret and then without picking the string again hammer on the 12th fret with your other finger.
~~ refers to vibrato. That is hit the note and then bend the string up and then bring it back to its original postion.Do this over and over again and you have a vibrato.
I hope that was not too confusing.
Overwhelmed as one would be, placed in my position
Such a heavy burden now to be the one
Born to bear and read you all the details of our ending
To write it down for all the world to see
But I forgot my pen, Shit the bed again...