You still have the problem of legalities and insurance. Take care of that first, then think about running games.
Or do like I suggested; hang around for a few months and learn first. Then next season, when you know what's needed and have the cash for it, organize games.
You really DONT want to face the consequences of not being ready in case you get sued OR a complaint is filed with the cops. All it takes is ONE mistake or ONE person who sees "GUYS WITH GUNS!!!" and dials 911.
Allright? Your choice. It's your ass on the line, not mine.