how do i set up my posting schedule and recurring timeslots?

your posting schedule sets the recurring times the queue uses, per persona's account.

1. 1go to the posting schedule screen.
2. 2for each persona, pick a day and add a time: repeat to build a weekly pattern.
3. 3remove a time any time by clearing the slot.

from then on, 'add to queue' fills these slots in order.