You've come exactly to the right place, Lopez! Welcome to the best source on AZ hiking info on the net!
In the tabs above, click the drop down on the MAIN tab, and browse the articles. There is a wealth of info there, from choosing boots to dealing with bears.
There are multitudes of books out there-one extremely instructional and equally entertaining one is Cody Lundin's 98.6 Degrees: The Art of Keeping Your Ass Alive.
ASU and occasionally some community colleges offer desert and wilderness classes.
Your best teacher is the landscape itself. Get out there an hike, don't freak out about the stickers and pickers, just be adventurous, use common sense and make sure you are hydrated- carry plenty of water for every run or hike in every kind of weather.
Finally, tell us about your adventures! There are extremely knowledgable people here who can guide you with their own experiences.
A true outdoorsman, when treed by a bear, sits back and enjoys the view.
Lost? Hell, I ain't never been lost. But I have been a mite confused for a week or two.
-The Mountain Men