I agree with the guys above, but why not have the best of both worlds? You're saying you need a way into gaining the confidence to approach people right?? Why not approach them mentally for a few weeks.. Interesting? I hope so, read on
You're walking around doing your chores, and randomly thoughts start popping into your head: "Wow she's fucking hot!" or "Maybe i could say hi to her"... Naturally, we don't pay much attention to those thoughts - they just resemble our gut intuition about certain women... So what i am challenging you to do, is for 1 whole week - go out for at least 30 minutes a day and start brainstorming what you could comment on towards a girl... Doesn't matter if it's a granny, cashier, or a potential love of your life (though, if you think a girl is that good, i think you better skip what i'm suggesting and just go balls out).
DO NOT say or use any of the material you are thinking about.. It's more about getting you into the "routine" of noticing things about people. Once you are more attentive, you will have a much easier time during day-game. And once you've mastered this, you can work on improving how funny you are, etc..
After 1 week, just go out and try to start simply by saying hi to the first few girls.. but eventually work your way up to saying more complicated sentences: "Hey do you have a light?" to the girl standing next to you smoking.. or "Wow this weather is crazy".. yeah these are old-school lines that i highly doubt will get you laid. The thing is NOT about "getting" anything from women - it's about you developing a routine of noticing women and what's going on in their lives.