Go to Start , then select Settings > Accessibility > Keyboard, and turn on the On-Screen Keyboard toggle. A keyboard that can be used to move around the screen and enter text will appear on the screen.
Place your thumb on the desk or the tabletop on the left side of the mouse. Your index finger (pointer) should rest on the left button of the mouse. Place the middle finger on the right button of the mouse. Your ring finger and little finger (pinkie) should rest on the right side of the mouse.