more of a setup question, but I'll answer it anyway.
It's not hard if you know what you are doing. Since you are new to bass, I suggest taking it to a pro. Ask if you can watch him work, and have him explain what he is doing and what it does. A setup should run you anywhere between $30 and $80, depending on what all they do. If new strings are included, expect the price to be more.
Typically, a setup consists of raising your action with the saddles screws, checking proper intonation, and making necessary adjustments, adjusting the truss rod if there isn't enough neck relief, or if there is too much, setting proper height on your pick ups.
Thats pretty much all there is to it. Tricky and potentially harmful if you have no idea what you are doing, but not really all that involved.