Grab a copy of Writer's Digest from your local book store or magazine rack and start reading. Every issue will help you with some aspect of your writing. Pay attention to the WRITING parts as well as the BUSINESS parts. That kills most new writers faster than a bad review. LEARN the BUSINESS of writing.
Next, read. Read everything on everything. Learn how experienced writers use language to express their thoughts, emotions, and ideas. Read dime store crap and the greatest novels in western civilization. Read it all. Read every night before you go to bed.
Next, learn your craft. Take courses and study the use of grammar and language. Take a poetry class. Yea, boring as heck, but true poetry (not this modern stuff) will teach you how to use language to paint a scene. And get a word a day calendar. You need to know a lot of words if you are going to be using them. And be sure your classes are taught by tight-a$$es. You want hard critiques of your work. This is the time to learn, not be pampered. If you just want to be pampered then give your stories to your mom. She'll kiss you on the forehead and put your story on the refrigerator. But no one else will ever see them.
Finally, write. That's right, write.
Everyone wants to be a writer, but no one wants to do the work involved. If you want to be a writer then you have to write something every day. Write about anything, but write.