The height thing is just an example of something most women find attractive. One very important first step to not caring what other people think, is to not be easily triggered by statements others make.No comment. Are you going to tell me you learned to tie your shoes at 5 next? Though really, the height is such a cheat code. I ain't ugly, but 5'9 is 5'9. I haven't checked since last year though.
That's one of the signs I see most readily with my blue pilled friends. They quickly and emotionally react to statements. Me, you can say just about whatever you want and you're not going to get a rise out of me, particularly if I don't know you. If someone thinks their input is valuable, they need to prove it first, before I give them the time of day. You don't need to be that harsh, but in some respects it's not a bad mentality to have.
The only thing I meant by the 6'3 comment is that I've observed females from a very far distance walking towards me. They never lift their eyes from their screens to even check if I am attractive to them or not. I am just an anonymous 6'3 blob. The point is not whether an individual girl likes my looks or not, but that I could have been Brad Pitt, and she didn't even bother to look. This is the level of female narcissism.
For what it's worth, I think the height thing is a bit overrated. If it wasn't, wouldn't women be checking out every tall guy they see? I think in Current Year, physical looks are probably less important than they used to be. I saw a very attractive college girl at the gym yesterday with a guy that I would have been a bit shy publicly hanging out with at that age. Maybe he was a gay friend, but he was there working out with this gorgeous girl, and he was downright goofy looking. And I see mismatched couples all the time in the looks department.
But I second all the advice here about making brief small talk. I've found, while I have a rather small group of true friends, I can satisfy some social needs just by making brief 1-2 sentence interactions with strangers. And if you practice doing that it will be easy to start conversations with anyone you want, including women. Honestly, they are the ones that should be nervous, as I'm past the point of being excited that a "hot" girl is speaking to me, and more likely to be bored by what they say (or more likely, the insecure uptalky voice they say it in).
Also I second the comments about not needing to be a jacked James Bond type to attract women. I remember one of the oddest things I read was that how Woody Allen was such a natural confident "alpha" around women, and he is one of the least impressive physical specimens you can find. But it's true.
And stay away from pornography. I can't imagine how much worse it is today having a teenage libido with all the extreme free stuff available online, but it harms you mentally, physically, and spiritually. Don't get discouraged when you fail, just note it and try to stop it the next time you get the urge.