No problem. It is kind of tricky!
When they're babies, you don't want to burn them with manures or meals or a rich store bought soil. So in the their first home, the cups or smaller pots, you only put peat (or pro mix) which doesn't burn and some good potting soil to get a good mix. After 1 month, either you have feminized seeds and you can put them in the hole directly or you have non feminized seeds and maybe you'll want to put them in 3 gallon pots until they show sex, discard the males, and only put the females in the holes.
Worm castings is worm shit (doesn't burn), very important for drainage and airing out and food for plants/micro organisms.
Sphagnum Peat moss serves to lighten (air out) the soil as opposed to having all potting soil (heavy on the roots), and serves to retain water. That way you have a godd "water-air" ratio.
Do not mix 1/2 peat and 1/2 clay soil in your holes (bring other 1/2 of soil if the native dirt is clayey or argilleous).
PS:
Add vermiculite to retain water if needed. Add perlite (expensive) or sand (cheap,free) to drain.
To get peat+vermi+perlite+trace elements+fungi: Promix-Bx or same type. The peat (or promix) does not need to be added in winter as it doesn't hurt the plants and can be used from the bag.
You can add a rich potting soil/old compost for the other half.
And the worm castings
The manure and meals are already in the hole since Dec-Jan-Feb.