This light switch wiring diagram page will help you to master one of the most basic do it yourself projects around your house...
Wiring a single pole light switch.
Hey, doing it yourself is great but if you are unsure of the advice given or the methods in which to job is done, don't do it. This site is merely a collection of how some people do home improvements. There is no way we can anticipate every situation and we do our best to inform of any risks for each job. Be sure to check local building codes for proper installation and permits.
If in doubt, hire it out.