After a few weeks of individual or small group action, graduate yourself to half-court or short-field pick-up games. After another month, if you’re feeling pretty good, call yourself up to the majors… or at least, an actual league with uniforms and trophies and stuff.
Don’t underestimate the warmup
Just as you should ease into recreational sports as a whole, you need to ease into every single game you play. Even professional athletes take the time to warm up before a game, so how arrogant is it to think that you, an out-of-shape 30-something, can walk onto a field and start playing without getting the kinks out?
The answer, if you didn’t figure it out, is “very arrogant,” and yet, I see it all the time. Usually with poor results.
Show up five to 10 minutes before your practice or game and put yourself through a few simple drills. Jogging, hopping, lunging, skipping and lateral slides are all great calisthenic options to get blood flowing to your working muscles, preparing them for more strenuous activity.