Seriouslt, my best advice to you is, don't be scared of failure. The only special woman in your life that can never be replaced is your mother. A random girl in a bar that you have just met are nothing to be worried about, look at it as you have options (if you feel you don't, trick yourself into believing it) and you will feel more comfortable. Myself for example, when a girl doesn't reply to a wierd joke I make, I don't cry over that, I just feel that "well, if she can't take that we definitely have no future".
The best way of learning is to try things and then analyse the result, if you make misstakes you will never do them again and you will have learnt something on the way.
How to play the midgame I don't know, just wanted to tell you to stop being anxious
