Hi willow,
I won't say it's not hard to study, work and have a family. But if its something that you really want then go for it. It can be done. You just need to prioritise. You do need to be organised and dedicated- to your family and to your studies and it is a balancing act, but in the end well worth it. It is something that will be for you and the pride and accomplishment you feel when finished is great! You can do it, it does take time to get used to it and can be a bit of a struggle at first, LOL even at the end!! But as I said it's worth it!

Maybe try a shorter tafe course or something not as long and involved as a uni course to see if it's really what you want?