Bikes are like cars, if you have the right tools everything can go pretty smooth. Bikes are not like cars in that they are pretty simple to work on and with the right information comes a certain amount of pride.
There are some excellent online sources of repair information and education too above the old this is how to change a tire stuff.
parktools.com has a great online help and as always, capt bike sheldonbrown.com has some of the best stuff.
Jump in, get dirty and have fun!