The first time I wanted to finance a car I discovered I have what’s called a “thin file.” My (interest free) student loan wasn’t reporting to all 3 agencies. I was able to get my dad to co-sign. I was 26. Discovered then that being told “never ever ever own a credit card” (by my dad!) was very bad advice. Get one with a low limit and use it to pay the same bill every month. Credit! Now other places trust that you pay your bills.
I’ve since gotten several cards (it’s been nearly a decade) and they each serve a different specific purpose. I purposely target high signing bonuses and my purchases are better protected. My limits are stupid high, which I guess is nice but I’ll never put that much on so it’s a bit pointless. Then again, knowing I have access to that if things ever become dire is nice.