I have 4 WGI cameras. I've bought each new for no more than $50, the newest one being 2 years old, oldest being close to 10. They all work fine, except that the oldest takes white out pictures at certain light levels.
The only other brand I've bought was a Remington for over $100 that wouldn't work straight out of the box.
The settings on mine are pretty straight forward; time of day, resolution, picture or video, and date/time. I leave them out from June to freezing.
I have had multiple SD cards fail after a year or so though.
Ask your son to help you set it up. Assuming the camera is fine, i'm sure you wouldn't have any problems after that.