Next you can start your sheetrock. I went with 5/8" because it's fire resistant and it'll hold up to me falling against it and stuff in the garage. The stuff is HEAVY though. I'm going to need some help getting it up for the 2nd row on the walls. My garage stinks because the walls are 9' high. So I'm going to do 2 rows of full sheets and then a 1' strip on the top.
This is my 1st time putting up rock by myself, so I'm learning as I'm doing it here. It's not rocket science - you just need to triple check all your measurements before you cut. I'm using 1 5/8" course thread drywall screws to hold up the rock. Use a drywall screw bit because it'll put the screws in to the perfect depth. I prefer screws instead of nails because you end up with no hammer divots and the screws won't pull out like nails - which create nail "pops".
Also, add some shims if they're needed. I added some 3/8" plywood strips above the door because that header wasn't flush with the rest of the 2x4s. That'll give me something to screw into.
I keep F'ing up lining up the holes for my electrical boxes. Gonna need some big ass cover plates, lol. I also need to install some deeper mud plates on my elec boxes. I have 5/8" plates on there, but they're still pretty deep in there.
That's all I've got done for now. Hopefully I get better at lining up boxes and whatnot .