3 hours is the minimum following time.
You can wait 1 year if you wish.
To send money on the SteemIt website, go to your wallet, point the balance of the currency you want to send, click at the arrow that appears, and select transfer.
Then simply fill the form.
If you are still not sure - Google "SteemIt send transaction". I'm sure that some people already made guides about it.
In this lobby, will there be T.P.? For my bunghole?