How do I get better at football again. (English Football)?

I used to be pretty good at football when I was between the ages of 9-13 and I went through a period where I stopped playing for about a year and a half. I am now 16 and I want to get good at football again because It is really frustrating when I am playing with friends who I was once a lot better than and now they are outplaying me. If anybody has any advice in becoming better again, It would be greatly appreciated. btw if you suggest joining a local team, that is not an option as that is why I stopped playing football, because of an argument with my manager and I never returned, but other than that I will gladly try and follow any training advice or tips. thanks.