If you are new to Android, the OnePlus 6t, or even just needing a refresher about where certain settings are located, then check out this 3 part tutorial below. This will go over each setting on your phone to help you set your device up to fit your style.
I will be doing a follow up video to this, so anything you would like me to include in the follow up, post your comments below.
Part 1
Part 2
Part 3