On the next screen, select the button to "Reset Forgotten Password," then click Continue
Select either to answer "2 Challenge Answers" (you answered these questions when account was setup
or "2nd Factor/One Time Passcode, 4 digit code will be sent to phone registered phone
Select continue
After input of the one-time passcode you will need to create a new password and confirm.
Link to the article on how to set up security methods so you can reset the password on myapps.microsoft.com:
Setup Security Method for MyApps YCCD Login Password Reset
Reset Password on MyApps:
Reset password on the new portal (myapps.microsoft.com)