How can i be a footballer in this condition?

i have dreams of being a footballer i have the skill becuase people tell me but the problems are first i have never played for a local team out of choice becuase i have wanted to because i would be to shy just going in out of nowere and the othjer problem is im 13 years old and i live in england where there is alot of competition to be a footballer and i could move to another country,oh and the last i dont even think this should worry me but when i am playing i need to put my hands down and fell my just i dont know is its a habbit but will this affect anything of what i want to do .so plase could you help me on all of this beause i dontb want to play for a local club couldnt i just send a letter to a pro club asking for a trial or somthing becuase surely at my age i should be looking to go on a mini league team.plase any help woul be much appricieated.thanks.