good question.
Realize that every poker room is different.
Many rooms let you play with real money without depositing (play either
freerolls, or they give you a no-deposit welcome bonus), some rooms require a deposit.
Withdrawal may have conditions, especially if a bonus or freeroll wining is involved. Conditions may be in the amount, or identification.
in the mean time, although you didn't ask, consider:
- play money is a lousy way to learn poker, most people conclude that it's useless as preparation for real money
- to play real money freerolls
- only deposit when you know you are a winning player, to speed up the time otherwise lost to build a
bankroll with freerolls