Ughhh yes, we know. The housing market sucks. In our experience Facebook groups have worked out the best. Join many of them and be active. Try to look into it at least once a day and if you find anything you would consider, write them a direct message. Keep in mind that this little text is your introduction to your potential new house mates. Therefore, even if it takes more energy and effort make sure to write something personalized and creative instead of the good old standard introduction message.
If you do not want to rely only on Facebook, make sure to check the websites the university recommends (https://www.tilburguniversity.edu/education/welcome-new-student/accommodation)