Welcome, have fun!
My list very closely mirrors Frank’s but I wanted to hop in on the fun.
For decks: 8.25”
Anti Hero, Real, or Krooked. There’s obviously a ton of other brands that use the same woodshop, but Anti Hero, Real, and Krooked are pretty widely available.
Trucks: Thunder 148’s, Indy 144’s, or Venture.
Wheels: spitfire formula four, either classics or conical full, 54mm. 97a or 99a duro. You’re going to want to something a little grippier but still forgiving.
Bearings: bones, reds or big balls. Best quality for price.
Hardware: 7/8th” Allen. It’s the quickest.
Grip: Black mob. When you’re learning to grip your own stuff it’s easier to grip with those little holes to avoid air bubbles, as you get better at gripping you can try out those other brands.
Helmet: wear one. While most of us don’t wear one anymore, nothing will make you want to quit skating faster than cracking your shit open.