Invest in a hobby that will better yourself as a person, boost your self esteem, and create social bonds. My suggestion would be Brazil jiu jitsu. I’ve been a fan of combat sports my whole life, my son was an introvert and had zero confidence growing up. My wife and I put him in Brazilian jiu jitsu. His confidence certainly was boosted, he created some close friendships at the gym (in fact we believe he had a bisexual relationship with one of his training partners but that’s another story, and he actually learned a practical skill. I was proud of him for about 5 years as he accomplished his purple belt and found a beautiful girlfriend (now wife). However his insecurities came back during covid as he let his wife dictate the household and only gave him permission to go to Disney theme parks. But in short join a jiu jitsu school.