As stated in original post do what I did and what many of the other kids doing the course i am starting in september did.
go beating, offer help as much as possible, dont be frightened to be told off a few times ( i dropped a feeder down a fooking huge cliff in our big wood) and if you are not enthusiastic and are 100% certain gamekeeping is the life for you then by all means go to college but as already stated do forestry and land managment aswell ( im doing first diploma in game and wildlife and then a forestry course) and will also be keepping my eyes and ears open for any either evenin