You could buy some of the White Stars, an ISA box set, or some of the other fine ISA ships, although your primary ship is the basic White Star. You could bide your time building those and painting them up before trying out the actual game. At the very least, the models are very cool for B5 fans even if you don't like the game, but I am quite sure you will. It is a very fun game. I think the new rules are due mid-August, depending on your location.
And if you need opponents, there is also Vassal and the B5 ACTA mod for online play.
Chris