Decide what you'll write
The first step is to decide what you'll write. Most new writers have had this experience: you read something, and suddenly you realize "I could write that!" or "I could write that BETTER!"
This inspiration is a signal that yes indeed, you could write that, and be paid for it too. You may be inspired by anything - an advertisement, an article, a book, a movie...
How do you get started writing for money? That's a common question. The above article may answer some of your questions.