Everyone can be an artist because everyone HAS an artist hidden inside them. Really and truly there are only four things that make an artist an artist.
Step 1: Find a medium that speaks to you. Raku pottery, ballet dancing, sewing, photography, video game design, radio or television interviewing or reporting, heck, maybe even teaching or managing people turns your crank, the list of options and mediums to choose from goes on and on. It takes time, determination and courage to find something that clicks and speaks to your soul. You will need to try new things and not be afraid to go back to something either. I learned photography in a darkroom and on film but I didn't really start to love it until everything became digital.
Step 2: Hone in on your chosen medium, learn from it, read about it. See what other people do. Try what they've tried. Develop your skills. Develop your craft. Push yourself, challenge yourself. Become curious. Ask questions. Explore. Try something new, find out what works or make it up as you go along. PLAY...
Step 3: Express yourself. Find out what you love about your medium and your craft. Do what you love. Develop a style, a look or a way that makes sense to YOU. Make it your way. Combine ideas. Change it up. Make new connections.
Step 4: Share your gifts and your talents with the world. Show your art to people. Ask for feedback. Create a dialogue. Open people's eyes. Touch people's hearts. But more importantly, bring your own heart. Because the reason we do art (of any kind) is to let the light of our little genius heart and soul shine onto the world.
So let that artist within you shine through, the world can always use a little bit more beauty.