Your humidity is on the way low side.
The best thing you can do for the little guy is leave him be for a couple days to a week.
I read your other posts and to be honest you have a lot of learning to do quickly.
Please start here
You are getting to a better point but the more you handle him before he eats, the more stress you are causing.
All the changes you made add to that even more.
I personally would get a small hopper mouse in about 5 or 6 days and go from there.