The short answer is that a ceramic heat emitter (CHE) is a good solution to pair with the DHP, but I would set up the DHP first to see how it does. You have time to experiment. I would also consider dividing your enclosure. It will be easier to heat and, if you're getting a baby ball python, it'll make it feel more secure.
A pic of your enclosure might help us better advise you. This thread will show you how to post them: https://ball-pythons.net/forums/show...-Post-Pictures.