I did my most recent graduate program at 31 with an infant. It's doable, but stressful. Of course, it's worth it in the end, but you need to get yourself in "student mode".
Once you have your course schedule, make sure that you have childcare covered immediately. I have had several friends recently finish nursing programs and the courses are pretty regular with respect to times, but the clinicals occur during "clinical hours". Then find regular times to study. Nursing school is NO JOKE, so if needed, go to the library at night to get work done. Seriously. I used to put the baby to bed and head to the den with the door shut for several hours to read and write papers.
Going to school when you have children is so incredibly different than when you were 18, you can't transfer any of those study skills. Ask for help when you need it. Freeze meals whenever you can. Give the kids appropriate responsibilities whenever possible. Talk with your husband and have him take on additional responsibilities for the next couple of years.
Be flexible, but stay on top of the assignments because things pile up very quickly. There was a time when I had textbooks next to the glider because I could squeeze in 45-60 minutes of reading during each nursing session throughout the night.
You'll get it all done and will be very happy that you did!
Patience
Organization
Planning
Accessing your resources/help