You are used to doing everything on your own most likely…but you will need to reach out to others to get notes you missed, ask questions to professors, sign up for tutors, etc.
If you find yourself not doing as well as you want, immediately go to the Professor’s office hours and ask what resources there are to help you. There may be a writing center or tutors or office hours or study groups.
You also might talk to a professor and tell them you were homeschooled…so you may be blind to classroom norms or expectations so would appreciate feedback.