Lots of hard work ahead.
One bit of advice, do not create a double vapor barrier on the wall with the insulation. You have paper faced insulation with plastic over that. You will create a condensation water trap as soon as you close it up.
One barrier, and it should face the heated side of the wall. I do not know your climate, but up here in the Northeast, our barrier goes to the inside wall, heated space.
Let me know if I confused you.