Most veteran Warhammer players belong to a regular gaming group, either a formal club or an informal group of friends who routinely get together to fight battles. There are many advantages to forming an association with other players. For example, you can pool resources to buy scenery or pay for the hire of rooms. Players can swap troops amongst themselves, and newcomers can come along and learn the skills of generalship, painting and scenery making.
One of the most entertaining group activities is to organise a campaign or league. It would take a fairly substantial book to explore these in any detail, but it's worth taking a look at how such things can be arranged.