Hi, Gwen in texas. Welcome to Wikipedia! I noticed you've just joined, and wanted to give you a few tips to get you started.
You don't need to read anything - anybody can edit; just go to an article and edit it. Be Bold, but please don't put silly stuff in - it will be removed very quickly, and will annoy people.
Ask for help. Edit this page, put {{helpme}} and describe what help you need. Someone will reply very quickly - usually within a few minutes.
Edit existing articles, before you make your own. Look at some subjects that you know about, and see if you can make them a bit better. For example, Wikipedia:Cleanup#2009.
When you're ready, read about Your first article. It should be about something well-known, and it will need references.
Good luck with editing; please drop me a line some time on my own talk page.
There's lots of information below. Once again, welcome to the fantastic world of Wikipedia!
There's no need to get discouraged. several guides on wikipedia are in place to help you learn the editing process, if not you can always ask questions here and other editors will teach you.