The first step you need to do is just ask yourself "How much I judge myself" people can read only what you show to them. So if you think you are no good that's the vibes people will get and think the same about you. "Accept yourself the way you are" There is absolutely nothing wrong with you. You are unique,  special and there is no other living creature like you.  Learning to love yourself first will give you ample of confidence and ease your social distress. Being shy or introvert is as normal as being outgoing or extrovert. So tell yourself you are perfect