1. sure, great.
2. not really, L1 fighter has 12, they have 13
3. No. just no. 1d6+1 isn't comparable to PC damage, also their to-hit is +3, PCs usually start at +5
4. yeah, that's pretty great AC, AC is independent of level and dependent on stats and armor only.
5. no. there are CR 0 enemies.
4.