There's evidence all around you mate.
Most of the guys on here probably started out reading the game and were amazed at what they never thought was possible.
Then they started to have the motivation to go out and try to do this stuff
Then they built up their confidence and skill
And some of them are having a lot more success with women than they were before they read any material. I know I am!
Rather than worrying "what if this doesn't work" why not go out and TRY IT with the motivation "let's see what happens if I do this." If you see it as a GAME, then there's no "failure" or "rejection", just LEARNING.
If you're in or near London then check out my daygame bootcamps if interested (check my sig below for details)
Welcome, and happy gaming!
p.s. UK & US girls are almost exactly the same. British girls from London are slightly more difficult to game but it's basically the same.