How to change/turn off Google assistant (voice assistant)

Posting here in case someone needs it.

How to disable long press of the home button (Or how to change to Alexa from Google assistant)

  1. Go to Settings > Apps & notifications > Advanced > Default Apps
  2. Select “Assist & voice input”
  3. Select “Assist app”.
  4. Change to “None”. If you have Amazon Alexa installed, then you can change to Alexa as well at this step.

Alternate steps: How to disable Google assistant completely

  1. On your Android phone or tablet, touch and hold the Home button or say “Ok Google.”
  2. Hit the Compass button (toward the right side).
  3. Tap the top-right avatar and then Settings > Assistant.
  4. Under “Assistant devices,” select your phone or tablet.
  5. Turn off Google Assistant.