I'm in my mid-40s, have a 7 year old and a 2 year old, and work full time in a school. I find time to study evenings after putting my children to bed and on the weekends. My most valuable study time, though, is Sunday afternoons when my wife takes our sons to her parents for a few hours. It's hard work, but doable. I work a little harder to stay a week or two ahead of the module planner in case any emergencies crop up.
I had low confidence going in, but studied how to study the summer before my first module, and came out of it with a distinction, and a boatload of confidence. That confidence was then shot down as I enrolled in a maths module at a higher level than I'd done at school a few decades ago, so again I studied through the summer and am doing well again. (No danger of a distinction this time, though. But I'll pass.)
Being an example to my sons is a part of what I'm doing, and the eldest loves it. He loves grabbing my module books and dreaming about what he might study at uni. My youngest just likes pretending my calculator is a phone and scribbling on my notes.