I started college (university) when I was 36, in 1997. I got my degree in 9 years, though I actually finished in 8. I got enough credits to graduate with a double major, plus a minor in education.
It was overwhelming, in general, at first. Then, it was overwhelming only occasionally. I'm fortunate I did well. I was fortunate I had considerable "real world" knowledge as a background. I knew I had to follow the syllabi to a T. I had a few "all-nighters." I also worked full-time while going to college.
I was almost always anxious before any class. And especially during my speech pathology practicums, where I had to dispense therapy to people. I got a C in the practicum, but an A in the academic aspect of the final capstone course in speech pathology.