This site is a great resource. I would advise you to dedicate an evening to just reading, especially in the buildalong section. The Bowyers Bible volumes one through four are also a great read for new bowyers.
I would recommend that you first go out, identify a tree that is known to be decent bow wood, cut it down, strip the bark, split it, and get it drying. Then go out and buy a straight grained red oak board or two at a lowes or home depot or something. Try to get a bow out of the board while you wait for your natural staves to dry. You will learn a lot from the board bow build, and then you can try your hand at the stave.
Again, just get reading on this site, there is a lot of information here.