If you want to be an air traffic controller for eurocontrol bear in mind that you won't be controlling any aerodrome position. They only do some approach positions and center positions.
Although they only offer center and approach positions, their minimum requirements are almost the same as any other association asks for.
When turning 16 I went to high schoo and had to make that choice: languages, sciences or economics. I went for sciences because it has maths and physics, something that you need to have when applying to be an air traffic controller.