BaBee Girl,
I went back to college and got a degree in accounting when I was in my 40's. I didn't really find it too difficult; I think unlike my younger class mates, I knew I had to do the homework and read the assigned pages before coming to class. You will survive and even come to enjoy yourself once you get used to the rythym of being in school.
Study hard, but not too hard! I used to reward myself after tests by stopping by the fabric store on the way home or allowing myself some dedicated quilting time.
Lisa