Finally committed to the man cave renovation

Tore out the old paneling and drywall in my garage last weekend and wow it's a mess but it feels good. Planning new insulation, painted drywall, LED lighting, and maybe some built-in shelving for my card collection and gaming stuff. Wife said I have until summer so trying to stay motivated. First time doing something like this so if anyone has tips on insulation for a garage that gets hot I'm all ears