I second what Daisy said. Every type tree will have it's own requirements. This web site can be an excellent resource of horticultural information.
I am almost as far south as you are, and I can tell you that the winters are too warm here for apples. Peaches, pears, figs, and plums will probably have possibilities for you.
Most likely you will have to irrigate the trees you plant. June-October or November, I have to water my garden, shrubs, flowers, figs, and pecans.
My suggestion is to start small with a few choice fruits and/or vegetables so it does not overwhelm you.
