Apple.com/recover – You can recover or reset your apple ID password. Account recovery is a process designed to get you back into your Apple ID account when you don’t have enough information to reset your password. Go to your Apple ID account page at www.apple.com/recover and click Forgot Apple ID or password. Then you’re asked to enter your Apple ID, click “If you forgot your Apple ID”, and you can look it up.
That’s it, now your two-factor is enabled and you can easily access it.
We advise you that it is for your own good to either make a copy of the apple recovery key and give it to someone you trust or store it for later access. Because if you’re locked out of the Apple ID and lost the recovery key. Then, rest assured that it is nearly impossible for you to access your Apple ID.