Being nanny after aupairing

Hi. I'm Fitri from Indonesia currently living in Belgium as an aupair. I wonder if there is possible for me to be a live-out nanny in Belgium after my contract ends. A family in Belgium offered me to be their nanny. But I am not sure there's a legal way to come back to Belgium and hold the work permit as a nanny after I have hold the blue card as an aupair. Maybe one of you can help me about this case? I am interested to work in Belgium legally.

While we wait for responses here, you may also check for FB groups for Au Pairs in Belgium. Search in FB for "Au Pair Belgium", there are many active groups. I am sure many of those group members may have passed or passing through this phase and you may get some helpful tips from there.