As i mentioned in my previous post in this thread, some clubs are better than others!

Might be worth doing a search on the net for any other active clubs in your area.

As for the DBA/DBM thing, as DBA is basically a simplified version of DBM (well the other way round really as DBA was here 1st!) once you have your 1st 2 armies for DBA (1 for you and 1 for your son) you can start playing and then expand them from there to create DBM armies.

With the added bonus that it breaks your son in gently at 1st and then the DBM rules aren't that much more compex.

And I second the Mordheim idea, it really is a great game, though as mentioned to me it is a skirmish game rather than a war game.