Usually foreign students come to Antwerp through exchange systems, meaning two education institutions work together: a sending and a receiving institution.
Check in your home country which educational institutions have ties with Belgian partners. That is always the first condition. The most commonly used system in Europe is the Lifelong Learning Programme (LLP), which has separate programs for higher education (Erasmus).
In countries of origin, scholarships can be awarded to finance a foreign study, usually by a research or educational institution.