Tap Status Bar located at the bottom-right of the screen > Setting button > Advanced > Accessibility > Manage accessibility features > Enable Enable on-screen keyboard just a click, and you are all set!

Go to Start, then select Settings > Ease of Access > Keyboard, and turn on the toggle under Use the On-Screen Keyboard. A keyboard that can be used to move around the screen and enter text will appear on the screen. The keyboard will remain on the screen until you close it.

Note: To open the OSK from the sign-in screen, select the Ease of Access button in the lower-right corner of the sign-in screen, and then select On-Screen Keyboard.

As simple as that 😉