[Vehn]

I have some general newbie questions

What exactly is the input for an HO/PO? Like notes A and B are next to each other, you hit note A and strum, and then hit and hold B, and then it counts only when you release A? Any good passages where I can practice this?

Do people consistently strum up and down even in the slow parts? The only time I do it is during a bunch of the same note in a row coming fast.

I have stubby little fingers, how screwed am I when I get to hard+? I am working on 5 starring all of medium and doing OK.

Why is there so few master tracks? They bought the rights to the songs, why not use them, or at least use the vocals?