A good idea would be just to learn the basic cords like A, E, C, D, Am, Em, Dm, F, and G. Learn those nine chords and just practice switching between them in different order with different strumming patterns. Then, start learning some easy songs, Nirvana for example, is not too terribly difficult. The first song I ever learned was Smells Like Teen Spirit. Also, this site is great. I wish I would have known about it when I started playing. Good Luck!