A new problem? Ball python moult

Hi again.
The day after tomorrow I wanted to change all the coconout fiber in the terrarium because I have a little humidity problem with that, I talked about that in another topic of this forum (thanks for all the answers anyway, I really appreciated them :) ).
The problem is that my python have decided that it would be a very wonderful idea to start a moult, his first with me and I know that I can't touch/stress him when he is in this condiction. Soooo... Any ideas?
I'm also worried that the moult come out in pieces because the probably wrong humidity... But for this probably I'll ask in this topic when time comes.
Someone can tell me how long the moult during more or less?
here some photos of his eyes, that are the thing that let me understand that he started the moult.
https://ibb.co/vmdr5HS
https://ibb.co/hM62Pxc

Based on your pictures I would say he's definitely getting ready to shed. My guy is typically done within a week, 6-8 days somewhere in that area. You're correct in not wanting to disturb him while he's shedding. You got a good bit of advice in your other thread, so I won't repeat it here, I would just leave him alone until the shed cycle is complete. IF there are stuck shed issues, we can help you with that when the time comes. Right now just take a breath and let him do his thing.