Thank you so much for watching!! I do soil at the bottom of the moss pole that goes in the pot to avoid suffocating any roots that will grow in the pole in that area.
I fill my moss pole over my potting mix container. Like... in it. Makes it easier and cleaner. I just put the container on my potting mat too and fill it up.
I saw a video recently that suggested putting the base of a moss pole into a small pot which is then put into the main pot, the idea being that you could water the pole without over watering the whole plant, not sure if that would also help filling them be less messy (if the whole length was moss I guess)