Look online for local gunclubs. Most have a website and a contact number. Call and explain yourself, and why you would like to join (most clubs annual fee are very reasonable and a good investment). Attend a meeting or two, and you will probably quickly meet a few individuals who would be happy to introduce you. Like was previously said, a firearms hunting safety course is an excellent idea, and free.
Remember the key rules of gun safety:Treat all guns as if they are loaded.
Never point it at anything (loaded or unloaded) you do not intend to shoot. Alllways be sure of the area behind your target. NO ALCOHOL prior to, during , or at any time a gun is being handled. Firearms and motorcycles tend to bring out the boy in all of us...be safe.