>>48If it's a good bike it won't really need maintenance. Just take it to a bike repair shop every once in a while to tune brakes and shifter and check up on it. Once a year is probably enough if you don't ride it that much, otherwise whenever you feel like the brakes or shifter aren't working as well.
The only think you should probably learn is how to change the inner tube if you plan on going far, having it blow up when you're away from home sucks if you don't know how do change it.
Otherwise, just enjoy the bike. What kind of bike is it, mountain or road or city?