The ability to conceptualize ideas and organize concepts is crucial. If you hate having someone look over your shoulder, indexing is for you. Most publishing clients know little about indexing. You get almost no supervision or feedback. You must be able to learn on your own and work independently.
All work is done at home.
In most locations, you can meet other freelancers through professional organizations. There is a lively discussion group on the Internet. The world of indexing covers a wide range of fees and schedules. In general, the higher the fees, the more demanding the schedules. Jobs are short, ranging from 2 to 6 weeks, so you can take time off in between projects, during the summer, etc.