Oh no!:E Cemeteries are almost universally considered to be off limits within the metal detecting community.
Just as there are certain "good manners" in the RV world - not cutting thru others' sites, picking up your dog's poo, observing quiet hours, etc ., there are good manners in MDing, too. Like respecting others' property (getting permission before digging), filling your holes, removing your trash finds, and more. Digging in cemeteries would be like emptying your black tank in a parking lot :W
There are several online MDing forums where you can get great information; some of the manufacturers also have general info on their sites.
MDing is a great hobby and can be addictive especially if you enjoy history. Part of the fun is researching places to hunt. Those forums and sites can give a good start.