Re: I'm really shy to approach strangers, not just girls, but all kinds. He
Had the same kind of thing. Way I fixed is was, unsurprisingly, practice.
For me, it went through Meetup. Found a good and interesting group, active and social, and went every week. So once or twice a week, you are in a group where you know a couple people, but half or more is new, and you have to talk to them. After a while, you just stop caring and say hi to everyone (and you meet lots of girls on the way too).
Now I just have normal women-related AA
Seduction is a martial art. Reading books and talking to experts is important, and helpful. But you won't progress unless you go out there and fight.