I got my guitar and my amp, and i know little and I'm confused about much. And of the things i do know, i only know half of it.

I can: Tune, vibrato, and move my fingers around the guitar...

Confusion:

How do i hold a pick, i either end up holding it between my first finger and my thumb or my middle finger and my thumb, but is there a correct way or does either work?

When i strum is it across the entire pick up area or only in the middle of them?

And in some songs like stair way to heaven, it shows split strings, how would i play that?

and when i strum is it my wrist or my entire arm?

And what are some exercises strum up and down?

I'm attempting hammer-ons and pull-offs but how do i know if i'm doing it correctly?

Where do i start learning? Strumming, chords/notes, etc?

Should i learn tabs or notes or both?

Thanks guys! (If you're wondering why i'm asking you guys, I've watched youtube videos, read a lot of things, and this is the only forum i'm active on)