How to Enable Google Assistant on any Android Device (No Root)

It is Very simple.

1. Go to settings.
2. Go to Google.
3. Tap on the 3 dot menu button and go to Help & feedback.
4. Again press the 3 dot menu button and tap on View in Google Play store. Which will redirect you to play store.
5. Scroll down to the beta tester option tap on I'M IN and then press JOIN. It will take a few minutes.
6. Search for the Google app in the Play Store. And again enroll your account in the beta testing program. I'M IN - JOIN.
7. Once this is done you can press the UPDATE button to get the latest version of play services and google app.
8. After its done head to Settings.
9. Language and input and change your device language to English US.
10. Again hit to settings, press Apps.
11. Scroll down and press the Google app.
12. Press storage and tap the clear all data button.
13. Once done open the Google play services page in setting app.
14. Again tap on manage space and clear all data.
15. Now open the Google app from the app drawer.
16. The Google page will open.
17. Slide the right bar and tap on settings.
18. And in the Google Assistant settings just turn on Google Assistant and press hold the Home button and the Google Assistant setup window should pop-up.
19. Tap I'm IN.
20. Then press Get Started.

WELL, IT'S DONE !!!