My advice is simple: write. I realize how trite that sounds, but the world is happening around you at all times. You are experiencing topics to write about all the time. You have material, so there's no worry there. And if you simply sit down and describe what you see and hear on the paper/screen, that's writing. As you do it, I also suggest not going back to reread until you've finished whatever your'e doing. Trust your instincts.