Plain old “info” might get somebody started, and the other tool that is useful is “apropos” also known as “whatis.” It narrows down and gives precise man page names.
When I first started using unix, way back in the dark ages, it was on DEC's version, called Ultrix. We actually had bound copies of the printed man pages. The problem was, in order to find out how to use the command, you had to know what it was first! It was quite a while before I found the apropos command. I remember doing a little dance in the office when I discovered it.