I’m trying put my phone number on there so I can reset my password

Hi

We can help you take the steps to change your Apple ID password.

The steps you came from are for if you've forgotten the password. If you have a trusted device or phone number available, you can change the password right from the device that's already logged in:

Change your Apple ID password

If you need to reset the password and don't have access to a trusted device or phone number, you'll need to use the recovery process instead:

How to use account recovery when you can’t reset your Apple ID password

Thanks for using the Apple Support Communities.