Okay, there are a lot of lose parts right now in your life so perhaps staying with your parents right now is best. I understand that you want to get an andel- or ejebolig but you’ve to be realistic as well about when you can get that and where you want it because honestly, the situation you’re describing right now isn’t ideal for buying and I’ve my doubts whether you would actually even get approved to buy. I’m not saying this to discourage you, because I know, eventually we all want to buy our own but I know plenty of people with really good full time jobs who are having a difficult time getting approved with a reasonably good bank loan, I’m sure you know how it works.
I think you need to come up with a plan about what you want and in which time frame you can get it. IMO right now your first priority should be to get the divorce through as fast as possible so that you case can move forward, find a job and finish your education. Take the SU lån, I think it will be a good idea. You can save up those extra money for later on. And toughen up because you’re depended on your parents right now, you are in your mothers house and you need their support and you’ll need their support later on as well when you move out because you and I both know how things work here - A good family support (dad and siblings) is not something you want to lose.