Hi Bros and welcome to the Community!
There are a couple of ways to accomplish a screenshot:
1) Press the power button and volume down button at the same time.
Do not release the keys until the screen flashes white.
The white flash means that a screenshot has been taken and a small menu bar will appear at the bottom of the screen. The menu will have three buttons and three different options: crop, scroll and share.
2) You can also take a screenshot by using the “Palm Swipe to Capture” feature. This solution doesn't require any hardware button.
To enable Palm Swipe, go to
Settings
Advanced Features
Motions and Gestures.
There will be an option called "Palm Swipe to Capture".
It's disabled by default.
Tap on it to enable.
Now swipe your hand across the screen to take a screenshot. The phone will vibrate to indicate that the screenshot has been taken.
👋 😊