Hello Keith,
Your mouse pointer may sometimes look strange when there were changes made on the settings, or the mouse or display driver is outdated.
While there is no option to modify the mouse pointer appearance within Word, it can be done by going to Start (Windows icon) > Settings (gear icon) > Ease of Access > Mouse. Try changing the Pointer size and Pointer color, and see how it goes. If the issue persists, try updating your device drivers from Device Manager. For instructions, see Update drivers in Windows 10.
Also, opening Word in safe mode only lets you run the app without add-ins or extensions. More information can be found here.
Feel free to reach out if you require further assistance.