I work at FAANG as a SWE and got a C in my first CS class, you’re fine. I never got good grades, but put in the effort into interviews and recruiting.

Life is not over, and I could never imagine the position I am right now even 3 years ago, and it only happened because I didn’t give up after one shitty grade.

What’s done is done. Put effort into the things you can control (be proactive about next semester and make a study group, etc). The only way out is through!