Where should i go to get my car installed security system

i purchased 97 camry recently. it doesn't seem to have security system..

Where should I go to get this done??

Is it hard to install by myself??



thnks advance..

if ur not electronically inclined and good with your hands and working around your car, id advise against DIY.
 
Should have local car stereo shops that will do this for you or chains like best buy/circuit city will also have systems and installation services.