Yes you can! You can either draw a signature by hand, or add one if you already have it
To draw a handwritten signature in Word:
Click “Insert” in the top bar
Select “Drawing”
Make sure you click “Draw” as the 2nd option → then select a pen
Start drawing your signature
Click “Save and Close”
Once you signature is added, make sure you resize it, as MS Word makes it full-width by default. Voila! That’s your signature.
This will definitely work better on a laptop with a touchpad, rather than with a mouse on a desktop device. Or, probably the best way, with a pencil on a tablet.