Someone lent me a guitar - how do I learn classical guitar

I've invested in my own copy of Solo Guitar Playing 1 by Noad.  It's awesome for my brain.  I especially like that I don't need my gadget in the same room.

Started exercises 23 and 24 today.  The focus is on string 2 and the first three frets.  But it adds in stuff we learned from the previous lesson like open string 3 and the first string frets.

My brain hurts

But also, I'm looking forward to getting my eyes checked in a few weeks.  I cannot tell if it's worse with or without reading glasses.

Can't wait to practice again tonight,