Just be aware that writing as a career requires just as much work (for far less pay) than becoming a lawyer. It may not be measurable in university degrees, but it requires as much training and work as any other career. Miss Snark (google her, she is your friend) used to say that you shouldn't quit on a project until you've queried 100 agents. Are you ready to be told no 100 times? And some people write several books before they finally get an agent...and just because you have an agent is no guarantee that your book will sell.
Is there competition? You better believe it. A lot of the competition is people who can't string two words together. But a lot is due to the fact that there are only so many slots, and there are more excellent books out there than it is possible to publish in a year.
I'm not trying to scare you off, just point out reality. Publishing time moves slower than glaciers. There is not a lot of money in it. But if you love writing, if you can't stop the stories from coming out, if you don't mind revising over and over and over and over and being told it still isn't right, and going back again and again until finally do find the spark and get it right--if you are willing to undergo criticism and hard work and the chance that no one but you may ever read it in the end--then yes, write.