Also idk about the Netherlands but in Finland there are "open path" routes to polytechnics (and probably universities) that you can attend for a small fee with no other requirements. The trick here is that if you study long enough and accumulate enough ECTS credits, then you may either get directly accepted as a full time student (thus making you eligible for all the usual benefits), or they can let you take the entrance exam and then become a full time student. All this without requiring the secondary degree that you'd normally need to enter.

Just something to keep in mind if you ever want to consider getting a degree.