Saving money/ Good cheap cars

I need tips on how to save money.

I am the worst when it comes to saving money.😩

I’m 18 and trying to save for a car which I’m determined to do, but every time I turn around I’m tempted to spend the money on something else.🤦🏻‍♀️😂

Also if anyone can help me out with what kind of cars I should look at that would help me greatly, I want something non expensive and something that won’t cost so much money to replace parts on (for example where I live it costs so much money to fix a Volkswagen)

Also I’d prefer my vehicle to have four doors. I just don’t know a lot about cars and don’t have any “car” people in my life, so I don’t know anybody else that knows much about cars.😂