I also suggest 1: finding a teacher. Teachers help you a lot. They won't just help you with music theory, they will answer questions, help you learn songs, and basically do anything to help make you a good player. 2: starting a band. In my expierience, you learn most from playing in a band. Whether it's a school band or a band with friends, it will teach you a lot about playing and finding your true sound 3: as of learning songs, first learn how to read tab. Once you know how, go to
http://www.mxtabs.net/basstabs.php for learning songs. Some songs I suggest are: 1)Iron Man by Black Sabbath 2)Smells Like Teen Spirit by Nirvana 3)Crazy Train by Ozzy Osbourne 4)Can't Stop by Red Hot Chili Peppers 5)Monkey Gone To Heaven by The Pixies. Those are some good easy songs that are great for beginners. Some of the first songs I learned. Then when you are ready, build up to harder songs like: Master Of Puppets by Metallica or Jerry Was A Racecar Driver by Primus. Don't push yourself. It takes time. Go at a steady pace. You'll be an excellent bass player in no time. Rock on.