Hey, Tiger Lily! I did have to take Microbiology when I went back to school in my mid 30's. I felt I was on a fast train trying to keep up with the Science teacher at the college. He was brilliant, and a very good teacher, but I just don't have a science brain at all! I took copious notes, studied very hard. I found I had to write the stuff down again, READ it ALOUD to myself several times, and take the study sessions incrementally to give myself time to absorb it. I was very proud to have made it thru that course. I have confidence that you can succeed too!
I'm sure I have a form of adult ADHD, so the study of such a subject was really hard for me!