Hey,
I was in the same position when I started. I did what the pet store told me to do and then I came here for my son's snake. I had a Herpstat II ordered the next day and made some big changes. It's not rocket science, and for the most part snakes are fairly resilient animals.
A responsible keeper can make a mistake or two, learn and go from there.
You'll get it all dialed in.
You have a great attitude and I know the snake will be in good hands.