Sounds normal to me. The not eating part can be for a few reasons, but let's focus on the shed coming off first. When I was a new owner, I was on this site everyday trying to learn everything I could. A lot of good info on here. Google searching how to care for ball pythons will either lead you here anyways, or to a site that has some wrong info.
Do you have a pic of your setup? I might be able to help you with your humidity problem easier. I had two tanks for almost a year before I switched so I might be able to give you some pointers
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This is about it for now. Have a massive shopping list started for this weekend. Hoping to have a much better setup soon. He has several silk plants at the back to hind under and I placed a dark cereal bowl in there also for now.