Hairdressing School

I believe many people do hairdressing as a vocational qualifications in local languages during later teen years rather than accademic studies try checking your local colleges to see. Im not clear its offered by other institutes or not in french or flemish

Talk to FOREM or its equivalent in Brussels and Flanders, but, as CC_R suggests, qualifying as either is normally part of the technical education system here rather than being something that one can switch to later in life.

I don't know if the system is the same in Brussels, but I know someone who went to beauty school in Flanders in her 30s. Of course it was in Dutch, but I would check with Actiris, the VDAB/Forem equivalent in Brussels.