I’m not an expert, just saved your comment as I’m basically in the exact same boat as you lifestyle wise! Young, getting through engineering school, trying to build my savings, still live with my mom currently(shout out). But I have bought, a $1000 2001 Nissan Maxima that’s only fault was a transmission that would get hot on longer/tougher drives at over 250,000 miles loved that car. Would have gone well into the 300,000 mile range if someone didn’t T-bone me. But I’ve also bought a 2011 BMW that while physically beautiful and engine-wise sound, I’ve found out little by little that the former owner spent ZERO effort on maintaining which can be expensive on any foreign car or advanced computer system.

So I’d say a new car can be a fantastic first credit boost IF you can afford it and make payment ON TIME. And if you opt for a used car absolutely buy private preferably from someone you know who bought the car new and you know has maintained it.