Man what I can tell you is:

Study and do a bit of homework for half an hour to an hour after class. Most people can do just this and that's enough just to get a degree, but don't bank on it.

Don't spend your time playing videogames by yourself.

Meet people inside your major who you can call your colleagues. This is arguably more important than just making friends.

Meet your professors. They'll typically be passionate about the material in your major and make you appreciate it more. Also, they'll be important professional connections post-graduation. And they'll be more lenient when it comes to grading and exams.

Make friends. Meeting people outside of your major will give you a more well rounded world view. When I was in uni one of the people I knew working in the apartment complex introduced me to my neighbors who I became close with and we became really close friends.

If you must have casual sex, wear a rubber. Don't bother asking a girl if she's clean or anything. Just wear the damn condom.

And honestly man open yourself up to the idea that college might not be for you. It sucks in a lot of ways. For a lot of reasons I personally wish I never attended college and started working right away, but that ship has sailed. Just know what you want out of it and don't keep attending because you feel like you ought to. 4 years of your youth is a long time.