How to make overlapping illustrations transparent
Hi, I'm fairly new to Illustrator and I just got the hang of the pen tool. I wanted to make a cool design for a t-shirt and drew some cars. I colored both cars white and add each car with a seperate layer so that the illutrations didn't colide with eachother. I actually want the cars to be transparent so that you"ll only see its black lines. Any way to make it transparent?

this is how I want it to be but transparent.

this is what I want to prevent from happening.
And like I said before, I'm new to illustrator and I only know a few tools so please explain it to me as if im a 6 y/o child 😜
Big thanks!!!
