What is your particular area of interest? There are several great sites that focus on a specific use or type of gun (hunting, long range rifle, defensive carbines, defensive/concealed carry handguns, bird/skeet/trap shotguns, blackpowder, etc., etc.). Many of them have been mentioned above - ARFCOM, GT, THR - yet there are many other resources available. The two that I frequent the most are
Defensive Carry and
M4 Carbine.net. These sites are oriented toward both the casual and professional shooters that carry or rely on a gun to protect their lives. Both share a style of moderation that is very similar to what we have here at CPF - very little is verboten, but you must be polite, and speak (type) as if your grandmother was in the room. They are both heavily populated with folks from all walks of life - military, LEO, civilian, retirees, teachers, students - you name it!
Welcome to the firearms community, and I hope that you enjoy yourself safely.
-Joe
PS - NEVER forget eyes and ears!