There's also quite a few leagues out there, see if there's one near you. You can also find lots of downloads available to help you make your own instead of buying it somewhere.
I'm working on building a Dungeonbowl game, virtually same rules.
The beauty of it is you can use whatever mini's you like as well as most of the leagues aren't GW sponsored.
There's definitely 3 tiers of teams, with some much more likely to win while others are destined to be 'the opponents' ie "Stunty" teams (Halflings, gobbo's etc). Do not start with these ones.
Very addictive game though. I've never played it without laughing.