Not to worry! It's the better way to learn. Worst case, you'll be well prepared.
A UTH is fine if the ambient temp of the room is high enough, 78 F or above. In that case a warm spot on the floor will suffice. If the ambient temp is too low, then you can't get away with a UTH and need to use something like a ceramic heat emitter (CHE), incandescent bulb, or best of all a radiant heat panel (RHP). Only in the coldest of rooms do you need both a UTH and RHP/CHE.
Try what Craig suggested and move the CHE (it is a CHE, right?) to one side to create a thermal gradient. Make sure you use a thermostat for it though!
Or you could leave it as it is, but get a second thermostat to regulate the CHE and reduce the ambient temp down to 80-82 or so. That is the lower end of comfortable BP temps and will allow her to cool off, if she feels the need.
You'll get it worked out. It looks as though you are definitely on the right track and you'll be enjoying your new snake soon.