Football teams for kids

I want to get my 4 year old son into a team, but have no idea where to start, we're based in Erdington, transport is not an issue though.
Have had a few suggestions so far from friends but thought I'd see what info you guys could provide as this is all new to me.
Boldmere St Michael's and FC Elite being two of the teams recommended.

Cheers for any help/info/recommendations.