Re: new to everything need help!
It does sound like it might be too much heat on the cold side. They need a cooler side that is around 75-80 degrees F. Your warm side sounds fine.
What about water setup? They will like to soak, and you'll need something to put into their tank as well.
I live in an arid area, and keep mostly tropical snakes. It can get as low as 30-40 degrees at night, so I try to keep the house thermostat around 75 degrees ambient. It can get as cold as 70 degrees, but they are (sometimes) smart and will stay closer to their warm side if that ever happens.
What about your humidity? What kind of substrate do you think you may use? Balls should be kept moist too, which will impact the heating in the tank as well.
I'd try to stick with heating sources that are specified for that tank size. I.e. if you have a 20G tank, use the UTH for 20G, instead of the larger ones. They need a gradient heat source, and when you bump up the size of those UTH, it may prevent that gradient from happening.
Things to keep in mind when you bring home baby. Get the feeding schedule from whomever you're purchasing from. If they feed every 2 weeks, try to keep that feeding schedule for the first month. If they are feeding them a fuzzy rat, try to keep them on that feeding size for the first month. It may not be appropriate from everything you're reading, but it'll be less of a shock for baby when she comes home. And then you can bump up feeding schedule/size to what is healthy for her. Also try to wait a week before your first feeding.
Another note on feeding. There is always going to be preference on whether to feed live or fresh kill or frozen thawed. If you feed live, STAY WITH THE SNAKE AT ALL TIMES. Never, EVER, leave a snake unattended with live prey. Fresh kill, I wouldn't leave in their tank for more than an hour, just because it may get too ripe too soon, especially with the heat source. But I don't have a lot of experience with this, because all of my babies have been able to eat within that first hour, or the food gets tossed.
Keep baby on paper towels the first month. Why? Mites. You can't see mites on substrates. You can see mites on white paper towels. As a preventative measure, you may want to prophylactically treat her as if she has mites, and definitely treat the enclosure and everything that goes into that enclosure (hides, plants, etc).
The first week you're going to want to hold her, hug her, kiss her, squeeze her (or maybe that's just me). Try not to. Again, she just met you. She needs to get to know her surroundings and your smells first.
I think you're onto the right path, by having the setup first and testing everything out. I wish I had done that with all my purchases, so I could test out my ability to keep the snakes happy and healthy. I did it more by trial and error, and although I learned a lot, I would not do it again like that.
Post some pics of your new baby once you get her!
2.4 BCIs, 1.1 BCAs, 1.1 tiger retics, 0.1 Burm, 0.1 Woma, 0.1 Columbian rainbow boa
But if anyone asks, I only have 1. The rest just showed up for the house party.