Hi ElizabethDoyle3,
I'm Roshan V S, Independent advisor and a Windows user like you.
I appreciate you for providing details about the issue and we are happy to help you.
Press Win+I>Privacy>Camera(From the left pane)
Enable option Allow apps to access your camera
Then scroll down and turn on camera for apps which you want to use camera.
After that access apps by pressing Win+S then type eg. Camera then click on the best match will open the camera app.
If you don't have any more questions, feel free to choose a rating and have a great day!
Best Regards
Roshan V S
Indepedent Advisor