(1) Disable drawing; (2) select mode; (3) highlighting text; (4) general info

[irefuteithus]

Hello. I am a technical incompetent, recently upgraded to Pro DC from Pro X and finding life very difficult (and indeed expensive). I have a Surface Pro and stylus. With Pro X, I could simply scroll through a document, selecting text and highlighting in yellow as I pleased and life was very simple. Now: (1) my stylus starts drawing in red everywhere (which I don't want), (2) the tool(?)-bar shows only the hand-mode, not the select-mode, and (3) I don't know how to highlight in yellow.

And query (4): does Adobe anywhere set out really basic upgrade guidance of this kind for bears of little brain like me?

[irefuteithus]

OK - (2) I've worked out, so any help with (1), (3), or (4) would be gratefully received

[irefuteithus]

Now (1), (2), and (3) all worked out (at the cost of some hours and a large proportion of my remaining hair). Only (4) remains.