How do I get back into Football (Soccer) after having not played for years?

Due to ankle/ligament injuries in the past (Long story) I stopped playing football (soccer) when I was say... 10? maybe. Well anyways, very young. Now I'm 17 and I was thinking of taking it up again. I always loved the sport and always wanted to start playing again, but my dad said with my injuries he would rather not.

I was really good when I was young and always enjoyed it. But then kinda got fucked over with my ankles. I'm planning on seeing a doctor to try and figure what is wrong with them, because the doctors I have seen don't have any idea. (There's a bigger background problem)

Anyways, I just wanted to know what I could do to get back into the sport?
How do I get back into Football (Soccer) after having not played for years?
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