Be a writer. Don't quibble about it. It doesn't matter if you have a day job doing something other than writing. That's what you do to make the ends meet. Your vocation is being a writer. If you write, you are a writer.
When people ask you what you do, don't say, "I want to be a writer." If you write, you are a writer.
Own it... live it... write about it.. Your writing will take on new meaning with your new thought pattern toward writing.
Tip: Be A Writer.