Writer's Block

I finally gave in to the urge to set up this thing - then chickened out of actually doing any writing. I have been assailed by doubts and fears: What if someone actually sees this? Could I get in trouble at work? WHY do I want to do this??? Why is this pulling at me - what about an old-fashioned journal? Is this what my students go through when they have to write an essay for me? How could my past students so easily do this? What could I possibly have to say? Then, as I am putting laundry in the dryer, my mind will start composing an entry.