I can't wait to see your new snake! Your set up just needs a wee bit of tweaking. Try to get the warm side up to about 92F and the cool side about 85F. These are 24 hour temps with no night drop. Your ambient temps ought to be about 82F-85F also. Remember, there is a degree or two of scoogie room but no more than that! You'll get really good sheds if you keep the humidity somewhere between 50-60%.
A lot of snake keepers like to not touch their snake for about a week or two after they get it. This allows for the snake to be able to settle in to their new digs. During this time you can change the water and substrate if you need to, but no touching the snake. It's hard to do, but it'll pay off in the end!!
After about 12 days, you can offer her food and then, if she takes it, don't touch her again for another 2 days. This will give her time to digest, and between now and then, you've got your temps to work on!!
Cool cool cool on your new snake!! Congrats!!!