Both our beardies were happy to be handled from day one also.
Did you mean what time of day to handle?
if so this just kinda depends on routine, yours and the animals but basically "when they are up and about"
not as son as they wake, maybe not too close to bed time, not just after eating, other thna that whenever.
As for baths, same thing, allow time for beardie to dry off before lights out, in turn be sure he has warmed up from the nightime cool before taking him out and gettin him wet etc.