Help with Starting off University

I’m just about to enter my first year in university as a mechanical engineer, and I feel extremely under prepared. I’ve spoken to someone I know in the same degree as me going onto their 3rd year for help picking the best course times and professors.

But I still feel like I’m blindly entering this degree. My math skills are okay but I’m good at physics. I studied in the French Bac system and I the system is obviously different to an American university but I did a good job on my SATs (1300)

I’m stressing because I have 2 weeks of summer left and no idea what I’m getting into, plus I also have to worry about making friends which I don’t have a problem with it’s just that I’ll probably get distracted by that and won’t study enough.

If anyone has any advice on how I should go through my first semester feel free to let me know 🙏🏼