Starting out to make money is the greatest mistake in life. Do what you feel you have a flair for doing, and if you are good enough at it, the money will come.
If you become great, then you can become happy. If you're happy first, it's much more difficult to be great.
It isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.