Should I?

I am pregnant with baby number 10.( I know. Lot of kids). Well I'm considering after the baby is born I should go back to college. I'm nearly 40. Is it too late for me. My husband supports me going back... I dropped out of college because I was pregnant and ended up starting a family and never went back... I love my kids, but I need something more than a mom title. I was two years away from a teaching major. I've always wanted to be a college professor. I think we are finally done having children! I'm ready to have something for myself. Finishing school will make me feel like I accomplished something more than just motherhood. Am I too old? Should I be considering this?