Without a phone number or recovery email, how can I recover my Gmail password

The first step is to visit the Google Account Recovery page 

Enter your Gmail username or ID in step 2

Choose "Try Another Sign-In Method"

The fourth step is to verify using another device

Waiting for the link to reset your password

The sixth step is to reset your password

Adding a phone number and recovery email to a Google account

you can also contact supporto on Google action button