I would contact the current club. I have been running a club since the 1980’s. An to do it right requires a lot of people doing different jobs.
it’s a ton of work and just doing the easy bit. In this case saying we are having a ride of some many miles started at a certain time is the easy part. My local club has 5 rides a day. Has a ride with gps account for club members. So the riders can access the 300 different rides that we ride. There different groups in the club based on what various riders enjoy doing. Century club , speed club, MTB gravel.
work with the local government on cycling issues. We developed a 60 mile loop around the county that is car free for people to ride.
so much to do.