I'd say start out with Python (can also be used on the web with the help of some frameworks). Python is very versatile and is one of the few languages to do OOP right (the other one being C#) so you'll get a good feel for it. PHP, although from my point of view terribly designed, is also a good choice as it is widely used. Ruby is very, very nice as well.
Whatever you do, stay away from javascript. It will just corrupt your soul lol. Who ever suggested node.js has no clue what they are talking about.
Cheers