Your school may also have other options such as magazines or creative writing platforms which you can write for.
As you get your feet wet as a writer, see if you can submit pieces to your local newspaper. Perhaps your local community has a weekly publication. You may not be paid but you may start to be published.
Take writing and/or journalism classes and speak with your teachers/professors about your love of writing. See if there are writing circles you can join where you learn to provide and receive feedback about your writing.
Writing is a much broader field than I think most people really consider. You can be a creative writer in a large variety of industries - marketing, education, along with journalism or writing books. You should consider what is your ideal creative writing outlet. I do a lot of creative writing personally but I also write for a living. I am an Instructional Designer. I write and create training that other people take (web-based training and videos) or training that is taught by someone (an instructor either in-person or virtually). And while it is not writing a novel, writing three to five minute videos is basically a short story. Creating a training program allows you to think about how the training should be composed. I write for a specific audience. I have to write it in a logical way that has a beginning, middle, and end. My writing is meant to be instructive, so it needs to be in the proper language of the job. It is not always easy to find that balance, but it sure is fun finding it.
The next important aspect is to 'empathise' with the character you wish to write, or become fully involved with the subject of your choice that you wish to write upon. A passionate writer puts in more meaning to the article written. Its a great career .
But keep a note of the flip side as well ! Have a positive attitude to accept rejected articles and stories. Make a note of the financial rewards of writing as well.
Congratulations on deciding to be a writer. Writers are very creative and work very hard -- but the pay off is wonderful. You get to see your story come to life. I think many writers have a genre they like and I noticed they also have a unique style, or rhythm. I recommend starting small and sharing it with people you don't know so you can get honest feedback. Also, it helps to find other writers you can trust to give you good feedback.
Good luck and I'll watch for Janelle S, author!