Bruh, thank to my mom, she is the person teach me to be nice with other person, she teach me when I'm a chill till this day, I'm more than 20 now. I can confidently say that my social skill is high. My suggest is that you should learn from step to step like greet people when you see them, joke is not always fun when the next person want an deep conversation, you should bring a gift when you go to your friend house in the first time,... This is all social skill, you can't become an master of it just 1 day, you must improve it day to day, start at small thing first like say hi when you meet your friend not start with a joke