I got a 45 on my first college exam, in honors physics. I had made only one course grade lower than an A in my life, in fifth grade. I thought my life was over.
I got a tutor, went to my prof’s office hours, and studied like crazy. I got a C first semester and a B second.
I made one other C in college, in architectural design. I am not artistic but had to take the class as an architectural engineering major. I also made a handful of Bs in other classes.
I graduated with high honors and got a fully-funded fellowship to engineering grad school. So don’t give up hope! Work hard and ask for help.