Hi Judy,
On your profile page, click the privacy tab. You can scroll down the list of all the privacy settings. You will find that the one with the yellow icon is labeled as public tree and public biography. That is the most open one you can select. The ones below that are green and white, but only available for dead people.
WELCOME TO WIKI TREE!!! Feel free to ask anything here - you'll get a fast answer from someone who knows a lot about whatever it is that you're asking!