Insulation help for my garage with pics

If you drill holes in the soffits, bees, wasps, etc will LOVE it. Cut a hole and use a push-in round vent. Or replace the aluminum that's there with perforated stuff.

I do not know how to insulate between the rafters and avoid moisture problems. I'm sure there's a way.

If you would like to spend a small fortune, put about 1/2" plywood decking on top of the rafters, then batts of insulation between them, then staple some plastic sheeting to the bottoms of the rafters, then put some "whatever" up against the bottoms of the rafters. Garage attic is not heated. Put a plywood lift-out panel in there, or fold-down steps. I have the fold-down stairs and they're nice because you can get bigger stuff up in the attic.