Teaches people to fly, and builds their own hours doing it.

Instructing is the most common first professional flying job, and it is a teaching job first. You are responsible for a student who will get things wrong at low altitude, and for knowing when to take the aircraft back. Most instructors say it is where they actually learned to fly.
The standard path. Add the instructor rating and start teaching.
Airline and commercial pilots · US Bureau of Labor Statistics, Occupational Outlook Handbook, May 2024 wages and 2024–34 projections.
Instructing sits at the bottom of the same occupation as airline flying, and the median above is pulled a long way up by the top of it. A first-year instructor earns a fraction of this.
It pays badly for the responsibility involved, and the responsibility is real: you are in an aircraft with somebody who will get it wrong, at low altitude, and you have to know when to take it back. The weather decides your income. Teaching the same lesson for the two hundredth time and still teaching it properly is the actual skill.