I think you're seeing these groups as significantly more narrow than they actually are.
If you like to play games tabletop, computer, etc. during your free time, congratulations, you're a gamer.
You don't have to like all of everything 'nerdy' to call yourself a nerd. It basically just means you presumably have at least some field or aspect of culture you care about/are knowledgeable of. (Games, anime, movies, comics, tech, science, sci-fi are probably the main ones, but far from the only)
At any rate, don't worry so much about whether you're a part of some sub-culture. Find things you enjoy and enjoy them.
If you like to play games tabletop, computer, etc. during your free time, congratulations, you're a gamer.
You don't have to like all of everything 'nerdy' to call yourself a nerd. It basically just means you presumably have at least some field or aspect of culture you care about/are knowledgeable of. (Games, anime, movies, comics, tech, science, sci-fi are probably the main ones, but far from the only)
At any rate, don't worry so much about whether you're a part of some sub-culture. Find things you enjoy and enjoy them.