How many circuits you gonna need?
I suggest getting a electrician,Wish I was closer id do it for ya!
Nothing really to it,mine has a panel in it tht i ran some triplex from the main panel to my Garage panel box.
Tht way i can have 220v for my lights and A/C,Then 6-8 110v outlets.
The insulation just get a good staple gun and put some baby powder on your arms...keeps insulation from getting in you to bad.
Beech