1. i usually just look up generic stock images online, or sometimes i use actual paintings/historical depictions.

for instance, this panel

is just a heavily edited version of Panici's "Roman Capriccio: The Colosseum and Other Monuments":

That's what I do for most of the panels. except for the hands. i just take pictures of my own hands for that.

The pixelated effect comes from using the black&white effect on all the pictures in ms paint.

2. probably samarie or o'saa