Start by joining your local team.
If you are good enough join your local team. Start small. If you aren't good enough, train to be good, do kick-ups because they help your touch a lot and try to get faster and stronger. Once you are in your local team, you need to hope you get a scout watching a match your in. There are a lot of scouts out there so you will get one eventually. Have the right attitude because they look for that. If I was you, I would start (or join) a five-a-side team because if you master the pace of 5-a-side, the quick passing and shooting in smaller nets, you will be a lot better when you do 11-a-side. If it is possible, join both a 11-a-side and 5-a-side team because game time is very important. You need to be playing at a level where you are not the best because you always get better at football by playing against better players. Most of all, enjoy it! Football is a fantastic sport! Good luck in the future!