Hi Anonymous and Welcome,
You are already a guest member and you can explore everything and ask more questions here.
Here is a link to some information to start with
http://www.wikitree.com/wiki/How_to_use_WikiTree
In order to be a contributing member and help us grow the tree, go back to your profile page and volunteer (there is a box to click) and leave a message in the public comments about your interest in genealogy.
Again, welcome and do come back here with questions.
