The issue is that you are thinking way too much. Act normal. Your biggest lack right now is in confidence obviously. Approach them and talk about whatever you want to talk about. If you find the person unattractive, uninteresting or you are not feeling the situation, don't do it. Don't force yourself into an awkward situation although you can certainly grow from such.

Approaching and attracting women is natural. Build a social bond first and slowly act slightly more attractive and seductive than you think is normal. It actually is normal, it just seems intense to you since you have never done it correct.

Try situational or observational openers. Also try skipping the greeting and just start talking to people: eg. Not "hello... I like your dog, what kind is it?" Rather, "wow, I like your dog".

I think acting natural doesn't come natural to you. That's normal, but its obviously problematic.

Like was said before, you have fears of rejection and failure which hang over you and impair your ability to relax and go with the flow.

What you might want to try is starting things out with something absurd, something that couldn't possibly make you seem normal. By doing this you already know that people will probably laugh at you, and in fact, you are embracing that type of response. This goes back to the old technique of walking around the beach with a dildo strapped to your forehead while wearing a dress. It will desensitize you to awkwardness and social disdain.

I have a One Direction opener I made up....keep in mind I'm in my 30s. Go up to some girls, a woman, a man...anyone, and tell them you have a quick question. "Who is your favorite member of One Direction?" All you need to know is the name Harry or Liam. If they say Harry, you say "I'm more in the Liam camp myself." or vice versa. Usually the people won't know any names and just laugh and be like WTF? You can't beat that as just an absurd ice breaker of an opener. You can really go anywhere from there, and now the pressure is off.

You're dealing with a combo of approach anxiety and probably having too much pua data in your head.

You stated not knowing which angle to approach from. For now, forget all that's in your head about angles, eye contact, body positioning, and all that. The time to analyze your eye contact etc. is after you've been in a bunch of sets and THEN looking back using your pua knowledge and directing yourself as far as areas you need to improve on.

You mentioned going to look up some situational openers. Scrap that. All the situational openers you could ever want are already in your brain. And they don't have to be complex, creative, witty or anything like that.

Here's an example: Some chick looks lost. You go up to her, "You look lost." "Are you?" Another girl is playing fetch with her dog. "Beautiful dog, what kind?" Observe what is going on and use that for an opener; then build a convo around what you first talked about.

You're only out to explore and get a little conversation going; it's not as daunting of a thing as it may seem to be right now, as you'll find out once you've been in the game for a while.

The girls are bored. Go make their day with a nice lil chat would ya?