GOOD FOR YOU! One thing to remember, the professors are being paid to teach you. Don’t let them off the hook. If you are struggling, pay them an office visit. As an example: I made a career shift and went to college nine years after high school ( wasn’t a good student in high school). I was struggling to understand some of the concepts in one of my physics classes. On one particular day before an exam, I spent six hours in the professor’s office (I recognize not all profs will be so patient). If he had to leave to teach another class, I was there waiting for him when he came back. It took a lot of work on both of our parts, but he taught and I learned.
Good luck in your new career!