If it is shyness that is your problem:
The solution to shyness and learning to talk to girls is to stop seeing them as aliens from another planet.
If you remove penises, vaginas and boobies you end up with one type of person - human beings. All that stress associated with sex, love and just hanging out with girls to make you feel better do more damage than good, instead of overthinking everything from "what should i say to a girl at first so i don't screw up my chances to marry this girl and live a happy life with her for 55 years", one should think one step at a time - then it becomes less complex.
Just talk to girls like they were any normal human being. Find out about their interests, ask if they watch the same series as you do. It's simpler than you think, even if the first time feels like impossible. Once you have overcome that, you look back and wonder "WTF was i worrying about"?
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"It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring" (Carl Sagan)