Hi Ryan, Welcome to the forums!
Sounds like a great idea
. Probably the best place to start would be to join the multiplayer groups on steam and do some warm up rounds with the guys Virtual SlotCars user group
EUVirtual SlotCar Racers
You can create events there and people will know when it is and who is going to attend. Maybe make an announcement in the steam forums
for the warm up rounds also. Then, once you have made sure you have enough guys, and that their connection speed is satisfactory to play, move on to your endurance league. Let me know how the warm up goes, maybe even I can come along and join in