Setup an Account Recovery for your iPad or iPhone
Step 1 - Open Settings
Find Your Settings App. It may not be on the bottom dock but will be located somewhere on your device.
Steps 2 & 3 - Your Name > Sign-in & Security
Tap on your Name in the top left of your iPad or at the top of your iPhone, then tap Sign-in & Security
Step 4 - Account Recovery
Scroll down until you see "Account Recovery"
Step 5 - Add Account Recovery
Tap "Add Recovery Contact"
Step 6 - Add Account Recovery
Apple will highlight the importance of this contact being someone you know and trust. Tap "Add Recovery Contact again.
Step 7 - Add Suggestion or Choose Someone Else
Your device may suggest a Contact (Usually if you have Family Sharing set up. Otherwise Choose Someone Else. They must be an Apple user.