Be careful with rescues. They often need a professional trainer to get them sane and ridable. Many are also full of health problems. Theres a mare at my barn who was recently rescued from a abuse situation now has some desease were all her hair is falling out in clumps and she wont stop chomping her teeth.
With the economy so bad, if I were you id get a nice safe slightly older horse who is sound. Don't think about rescues for a first horse. You want something you can have fun with right away, not something that will take months if not years to recover and then not bewhat you want