Mariacatherine - the recorder should be easy to learn on from the self taught angle. I play a wood flute, and the hurdle was learning how to blow properly. But, with a recorder, where you blow through a stationary mouth piece, you should be able to make a sound easily. And, that means it should be pretty easy to learn. Spent time on youtube viewing instructional videos about the recorder. I am sure there are many. And, take grahams advice about getting the wood soprano recorder from the start. They are very affordable, and you will want wood soon enough if not already. I almost bought a moeck affordable wood soprano a while back. Mullenhauer and moeck are big names that should lead you to the recorder for you.
Another good option is a wood irish whistle(6 holes, very simple). They don't have as many holes as a recorder, and are easier to play. There are endless possibilities with 6 hole(2 octaves) wind instruments.