You're very welcome.
I use sphagnum moss in humid hides during sheds primarily. I've used it mixed into substrate to help maintain humidity, but not in a few years.
It's good to have on hand.
Oooh, just cause I thought of it right now and don't want to forget.... Do you have a temp gun? If not I highly recommend getting one when you can, they're an extremely valuable tool to have when keeping reptiles.
I'll get you some pics of my setups. Mine aren't as cluttered though. My BPs are both well established adults, so they don't require quite as much clutter. Once they've got more size on them they develop more confidence and you can simplify a bit.
But you'll get an idea. Just so I don't sound hypocritical, the reason I advise more clutter is that your snake is still small, nervous and acclimating.
Essentially, you just want to provide security, so less wide open area is the goal.
I'll have to take pics, I don't have any of my setups. Gimme a few but I'll get em for you shortly.