I started teaching online 4 years ago, and I have learnt a lot in that time. One of the biggest lessons that I have learned is that online teaching gives you the ability to reach any English learning market in the world and work with students in your niche.

If money is a big thing for you, then find students in areas where the going rate is high.

The link below explains this in more detail and gives you more information about how you can start teaching online.