WEBF I think you'd better just give up!
It would appear that if you could not manage drill, boot cleaning, or ironing during your basic training you have quite a major problem and, to be frank would seem to be wasting your time and everyone else's persuing a career that is not within your ability. Although I suspect the problem was more to do with attitude!
I'm sorry to be harsh but, sometimes you just have to face facts and take it on the chin.
I suggest you look at another career in engineering, perhaps for a Ship builder - say Vospers etc.
Thereby maintaining your interest in military matters without the hurdle of actually joining up.