And I think I'm worrying too much...
As in he doesn't eat much and drink much water :/
just wait to him/her to get used to his/her new enclosure. BTW is super cute how old is it?
What it is is super young. Babies should not be sold before 3 months old.
It takes time for babies to settle in and get used to their new environment.
And why is that? Do they take even longer to get use to their new environments?
You just have to make sure your care is spot on.