I went off to university right out of high school; but met my SO and ended up dropping out in my second year. After 8 years of raising a family, I went back to the same university. I found it a very rewarding experience and actually did much better being a more mature person. The university I attended had a "support group" for the "mature" students which met every day at lunch time in the student union. I found this to be very helpful. I think you will be fine! I did start off slowly taking only a couple classes at first but built up to full time.