Knowledge doesn't build courage or quell fear, only experience does. Being told where to find friends wont make you brave enough to go do it. If instead you had acquired the experience of talking to a girl in the park and to your luck she had responded positively, then your courage would actually be boosted to try again.

All pickup artist books are the same. They recommend to fake it till you make it. Go outside, and talk to girls. Pretend like you do this all the time, even though you are terrified on the inside. After a few times you will literally gain intuition and comfort and a better understanding of how this all works.