It depends on your current situation.
* If you're at a school with clubs, you could try to get into one of the clubs that most matches your interest, and you'll be around people that it's easier to relate to
* If you're out of school, there are meetups and events both online and offline, and various websites to help with meetups.
* If you're in the middle of nowhere but have a computer, there's VRChat, in which some people have decided to talk for the first time in a very long time. You can also go to worlds that match your interest, like laser dome, the beat saber world, escape the room puzzles, no time two talk, etc.

However, no matter the situation, you have to overcome the initial anxiety to meet people in the first place.
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