If you are thinking of making a first person shooter like Call of Duty, I don’t think you should worry about your idea being stolen unless it has some unique mechanics that make it stand out from other first person shooters.
I know blender aka I can 3D Model guns, hatchets, grenades, other items in general, AND I can do some of the building. SlMINIUS#8528 DM me if you have no one else. (: