1) It logically has to be F#, as you cannot hold a note and change it add the same time. Yes, that is F#.
2) Those are triplets, three notes in the time of two. You probably hear them all the time. If you don't know how to do it, there are plenty of resources online.
Congratulations on learning to read, it's a great skill to have!
EDIT: Ninja'd by Quantum