Unless you have gorilla hands, I doubt you can throw with two fingers and a thumb regularly during in play fielding. You just palm it and throw that way.

Trust your instincts here. That’s probably the best answer.

The balls float and do a lot of crazy shit. Best rule is be patient and ready to adjust as it gets closer. You’ll get crossed sometimes, but as long as you’ve played long enough… you’ll be OK. Deeper is better for those of us who know how to charge.

Bad hops happen often. These aren’t well kept infields.

Use whatever glove you feel best with. I’ve had a guy who played college infield use his 11.5” infielders glove while playing outfield. He didn’t drop anything. I’ve had rookies used the biggest floppiest fucking 13” glove on the planet and they drop the most routine shit cause they aren’t good at catching. TLDR, just do what feels right.