Mind you, your English is pretty bad and considering I only got a C in my Higher at the second attempt, it must be really bad for me to spot it.
There is no Higher standard maths involved in ATC, the Physics is pretty basic and when all is said and done, most of the English is spoken. Learning more about Trigonometry, Shakespeare or Newtonian Laws won't help you a damn at Hurn. Sheer bloody determination goes a long way though.
We've had stars at the college who were academically as thick as mince. We've had guys with 1st Class honours degrees who couldn't validate in Legoland.
Go for it.