Opponents wanted - GMT Time of Crisis

Would love to get an online game going, got the rules down pretty well, but I’m completely unfamiliar with how the VASSAL interface works. I’ve clicked on the “Find an online game” tab in the module, and could see that people were playing cards and such. But I can’t really seem to find a good explanation of how the game works thru the VASSAL server anywhere…
Anyone willing to walk a newb through this? Might also have a friend (maybe two) that would also be interested in joining in. Just lmk. Thanks