I'm new to the whole snake world - bought my first BP!!

[Slownlow]

Hey everyone, Sorry if this is long. I will post my questions in point form at the bottom!
So, I bought my first BP on 4/20 (what a date to remember ) I named her Nyx - Primordial Goddess of the night. Got her from Petsmart - couldn't tell me the age. But they don't get them until they're at least 8mths and she arrived April 2 - I say female as that's what they told me. She looks like she's an Alpha Morph.
Now my question is.. everything ha ha. - I have spent a fair bit of money just to make sure she's happy and healthy. At the moment she has Aspen in her tank (screen top lid) Zoo med's 20 gallon with snake kit. I recently switched over to the 100 watt heat emitting bulbs. No more light. I'm struggling with heat and humidity. I have the heat to about 85F on the warm side. That's what I can get consistent. But the humidity has been around 15-20% - can't get it up.
I purchased a humid hide, too small of a hole. Going back - also purchase the moss so I could wet it and put it in the hide. Since it's going back I actually took some moss and wet it and put it down on the heating pad which is under the light and I swear the humidity dropped!! I've purchased 2 digital thermometers, one has the humidity probe for it as well. She hides under her rock all day, comes out in the evening, trying to get out most times, sometimes basking under the lamp for a minute. I have taken her out of cage a few times. One time she was rather cold. She seems happy, fed her last Wednesday. Her first feeding at home. She took it like a champ and startled me lol. I think the fuzzies are too small for her. she's about 2 feet long. thickest part of her is an inch high at least. They said every 7 days.

- how wet should the moss be in her hide?
- besides orchid bark what else can i put in her tank to mist everyday? - will this bring up the humidity? - also purchased the coconut fiber.
- how exactly do I mist? the whole floor of substrate? Once a day?
- What is best to bring up the humidity on a consistent basis?
- is 85F too low for the warm side?
- should I be feeding her more often than once a week right now?
- Heating pad is super hot to the touch but I have aspen on it and some moss on that - she doesn't seem to burrow under the aspen. - should I purchase a thermostat to regulate the pad?
- is it okay that she is always looking to get out? She's not mashing her face or anything, but is constantly sliding up the sides to the top and checking.
- should i wrap the sides and back with a landscape and just leave the front open

I think for now that's all of my questions. My biggest concern are the temps and humidity and maybe feeding her every 5 days right now. the fuzzy was so small you wouldn't even know she ate anything.

Thank you everyone!!! This is my first forum of any kind and I read and read.