I want to study mathematics and/or physics, at this point aiming for doing research in either a field in mathematics or/and (theoretical) physics, although I don't have the required diploma from secondary school. I live in the Netherlands and there are merely laborious, impractical ways to get admitted into university in my case. Sadly, I have to be 21 or older to take an entrance examination. I think I'm ready for university for a couple of reasons, although there are no other than the common ways to get admitted. I'd like to ask whether there are any opportunities for me to get admitted into university abroad and how this can be fulfilled in a time less than a few years. To add, I've heard there are roundabout ways for one to get admitted into university. Is this true, where, and does/could this apply to me too?