Confidence and genuine interest can’t be taught. Unfortunately, they also can’t be faked. Humans have evolved to be hyper-aware of what others’ mannerisms and behaviors convey, and most socially adept people can sniff out a “networker” in less than a minute. The only way forward is practice — talk to people, be awkward and fail a lot, learn to care about others’ life and work, and express it (or talk about your own interests!) in a way that adds value to their life.
It maybe cannot be faked, but it can be practiced and one of the best ways to practice something is by faking it
You might not be able to convince people on your first attempt, but eventually you can build this skill if you try