Hello, and welcome to the loony yet quite pleasing ranks of Wikipedians! My name is BorgHunter, one of very many zany Wikipedians around here, and let me be the first to welcome you here. Before getting too in-depth, you may want to read about the simplified ruleset. If you need help on how to title new articles check out the naming conventions, and for help on formatting the pages visit the manual of style. If you need help look at Wikipedia:Help and the FAQ , plus if you can't find your answer there, check the Village Pump (for Wikipedia related questions) or the Reference Desk (for general questions)! There's still more help at the Tutorial and Policy Library. Plus, don't forget to visit the Community Portal. And if you have any more questions after that, feel free to post them on my user talk page. And don't worry -- you may well have a bunch of questions after that avalanche of info I just threw at you. Yeah, Wikipedia has a bit of a culture and etiquette of its own, but you get used to it!
You should also consider (if you have not already) creating a user page for yourself, to tell us a bit about you. Don't worry if it's small at first -- most people tend to grow their user pages over a period of time, much like Wikipedia articles. Don't expect everything to happen all at once!
If you ever think a page or image should be deleted, please list it at the votes for deletion page. There is also a votes for undeletion page if you want to retrieve something that you think should not have been deleted.
If you're still entirely confused, or would like to get a better grasp of your wikipedia skills, and you have an IRC client (or don't mind getting one), check out the Bootcamp. It's not what it sounds like, but it is fun and can help you with your editing skills.
If you're bored and want to find something to do, try the Random page button in the sidebar, or check out the Open Task message in the Community Portal.