How to make a car for garry's mod in blender????

Can someone help me, if i make a simple car model (shitty wheels aswell including a shitty driving animation) how do i actually get it inside of garry’s mod working?

I want to know the same thing

I am trying to learn it on my own

Depends what you mean by working.
If you just mean getting the model into Garry’s Mod, you need to save it as a .smd and compile it.
If what you want is a fully working car, you’re going to have to learn lua at the very least (or find someone to do it for you).