Patience young Grasshopper… We all don’t visit this forum everyday! Also Diamonds aren’t as common as other carpets. They use to have a sub forum for diamonds but that’s now gone.
I have herd that diamonds like a sharp contrast between hot and cold sides (a little colder on the cold and hotter on the hot). Remember to put a hiding spot on hot and cold sides!
As far as the humidity concerned, what type of cage do you have? Is it a glass fish tank? If it is you will need to cover most of the top. I use clear vinyl with a hole for the light. If it gets too humid I role it back a bit. It also matters what kind of substrate you use. I am using coconut chips because it holds a lot of moisture without feeling wet. When I mist I always use distilled water so it does not leave water stains on the glass.
The biggest bit of advice I can give is to convert them to rats ASAP! It is sooo hard to do it later! If they are eating fuzzies now feed them rat pinkies instead. Call around and I’m sure you can find them. Unless you want to feed them 7 or more mice at a time when they grow up? It’s expensive and it sucks!
I hope this helps a little. A great source for general info is- http://www.acreptiles.com/carpet_python_care.htm