I write as a future carrier commander, at this link DSSA Network Tracker, you can find a list of operations planned or in pre planning. Some of them have links to Discord channels or to forum posts explaining the operation, I think you should choose which one to join based on where the carrier will be deployed and by whom or by who needs more help. There are operations from many player groups and also by lone CMDRs, eg. "The Long Arf" is planned by the Hull Seals in Ryker's Hope(a group whose mission is helping CMDRs by repairing their ships when needed), mine will be in Odin's Hold (between Colonia and Sag A*) and really, mine is pretty easy due to the short distance involved, so think about it, you can help long distance expeditions (that need help the most) or whatever you prefer!