How do I get better are rigging/scripting cars

After following sleitnick tutorial on making cars and making my own one using it, I want to get better at making cars. I don’t wanna keep copying and using the same methods as in the video although it is good. It doesn’t feel right using the same script over and over and over. So my question is, now that I know the basics of making a car how do I get better from this?

you could learn by checking out the roblox jeep or the roblox police car

I’ve been looking at the police car, but it looks a little complicated. Any tutorials that go over the internals of the welds and joints in that model?