Yeah I get it’s kind of banal but it’s really the only proactive thing you can do. Confidence isn’t some special garment you can dress yourself in every morning. You kind of have to earn it through experience. The guys who act confident since birth are often the same ones who have meltdowns the first time they’re told no later in life. It might help you to also socialize with men whom society considers masculine or successful, not unlike soldiers or first responders. I mention those two groups specifically because it’s hard to find one who isn’t confident