I would get a thermostat as soon as you can and hook the UTH up to it. I think the cage sounds fairly large for a young python. You will also need a hygrometer. Try to get a thermostat that has a hygrometer built into it, and make sure it has a probe.
Where can I get one? Should i make another hide for "it" as well? (on the cooler side) Do you have any experience with moss? Also what is your opinion on the infrared nocturnal light?