[x] Start by looking for the supplicants you have yet to meet even casually: you need to know everyone before you can focus your efforts appropriately.
[X] Start by announcing that you're replacing Tasha in the First Quarter rite: the supplicants deserve to know as soon as possible, and that way, they'll come to you.
[X] Work indirect. Spend your time finding people with the acumen to be junior priestesses, then task them with making sure the rest of the supplicants know how things are going to work.