I am going to a course in leeds Utd, I want to be scouted, am I good enough?

My friends say im best defender in my school, wow. But im also one of the fattest, I get tired after sprinting the pitch, I get outpaced by loads of people. My family told me to get my statima up. I am currently now orginizing a fitness routine, but the course starts June 2nd(or 1st, its a two day course). I really want to play for them, maybe, proberbly not, I'd get scouted for the awesome MAN UTD! But I have NO chance if I don't make it into leeds.