I found myself in a similar situation when the prior guild leader left and I was assigned guild leader. I stayed active which is the point of this game and being in a Union. I kept recruiting until I found a core of active players. Some had more time and knew more about min/maxing the game than I which is fine. I appointed them officers and sub leaders. I created a Discord channel for the guild/union. Some people joined, some didn't. I keep the active players and expelled the inactive 20 days or more. We are still an up and coming Union/Guild. But at least we now are growing in number and strength to clear the Union events. There is other admin task like burst times, guardians, etc.