You could go in as a pipefitter know I load of lads who have done it, ex plumbers / gas fitters and a few that have no engineering aptitude at all lol.. Get the mandatory courses and get your cv out there, the rest is down to you.. A lot of the time it's not what you know it's who you know, I've helped a lot of my pals get a start and they all enjoy it, good money, plenty time off.. Jobs a gooden. Good luck mate!