If you are new to the fire service don't worry. There is a tremendous amount of information out there on how to become a firefighter. First, you have to want to become a firefighter. You need to take it upon yourself to get away from this computer and contact fire departments. Get involved with your community. You can also become a volunteer firefighter, which is how many firefighters became career firefighters. Once you start volunteering, the on the job training never stops.
A website with great information for aspiring firefighters is How To Become a Firefighter 101. This site will guide you in the right direction for finding jobs, firefighter requirements, interview advice, and physical ability test info.