Probably wanna give the snake two or three days after it eats to digest, to prevent regurg.
The pro's on here all seem to say the same thing: when you get a new snake leave it alone for a week or so to give it a chance to calm down, also should leave them alone for 48-72 hours after eating.
Keep in mind even if you wait this long the snake may not be 'happy' to be handled, but it will be less upsetting. Of course it depends on the snake, but it may take some time for it to get used to being handled.