Getting a freebitco.in account shouldn’t take more than 15 seconds. All that needs to be done is to fill out a short online account creation form that only asks for an email address, password, and bitcoin address. Yes, you need to have your bitcoin address ready before signing up for an account.
If you don’t have a bitcoin wallet address yet, you can’t just put in a fake address because the system detects it. However, you can use a temporary real bitcoin wallet address and just edit it later on to reflect your real bitcoin wallet.