I assume you mean career not carrier.
First and most important is to find something that you like to do.There is nothing worse than doing a job you hate.
Next- how much of your life are you prepared to spend on this career
Most of it, as much as you need to and no more, as little as possible.
What is available in your area ?
Are you prepared to start your own business and put in the time to learn it (including going to college if necessary). remember this will mean for a short time (at least) you will have very little time for pleasureable activities.