Scroll down to Language & Input in the Personal section
Click on Current Keyboard. A pop-up will allow you to quickly select one of your activated keyboards. As the keyboard is not yet turned on, click the Choose Keyboards button at the bottom of the dialog
Find your newly installed keyboard and turn on the Toggle found on the right side of the keyboard’s name. No personal data will be collected.
Click on Current Keyboard again and this time, you will be able to select your new keyboard from the list
Click on your new keyboard in the Language & input menu to be taken to the specific app’s setup process and settings