Ive read a lot and also have been told that the most important thing in terms of game is your overall vibe. By that i mean you smile on others and just look happy and comfortable anywhere you go, so that women will feel comfortable around you and then it doesnt really matter what you say as long as you have this chill and cool vibe. Is it true?

Im good looking but so far ive never had any luck, and i think this might be the reason. Most of the times i go out im sober, and i also really have a problem smiling. Im also introverted so im quite uncomfortable in social situations. Even though im a good talker, i think that when i approach women, they can sense this and just feel turned off by this.

How can i improve this?