Babies are very fragile, its not like you can't handle them but you have to be very careful. Don't pull them off perches, you have to work them off gently, just their small size you can easily dislocate their spine or kink them. Other than that, once they get some size on them, it no different than any other snake. How often and how long to handle them is like every other snake, depends on the individual animal.

If you feel you must take your animal outside you could, but it doesn't offer any benefit to them. I wouldn't suggest it just because whats the point?