I'm going to say this once and once only. Being an introvert does not mean that you are shy. It does not mean that you can't get up in front of people and talk. All that being an introvert means is that you reenergise yourself by either being by yourself or with someone who you trust and enjoy their company.
Being an introvert does not mean that you are socially inept. It doesn't mean that you don't socialise. Of course you socialise, you just go home before a lot of other people.
Whatever you do, don't brainwash yourself into thinking that you are shy and that because you have discovered that you are a little bit introverted that you are never going to go out and socialise ever again. NO! Don't do that. Go out and have that beer. Enjoy yourself. Just know your limits.
Let me help you. Lets look at one famous person who may well be an introvert, Hillary Clinton. Yes, arguably the most famous women in the world at the moment. Is she going to be the next president of the United States of America? We will find out in six weeks or so.
Some people believe that she is an introvert. She probably is. Lets have a look at what we know. Well first of all she is married to Bill Clinton who I'm pretty sure is extroverted. This is not a science but you can find many instances of couples in which one person is out there while the one person stays within themselves a bit more.
Judging from what I have seen, heard and read I am willing to bet that the other main presidential candidate Donald Trump likes to recharge by himself or with his close family. Just because he is making all of these big announcements and controversial policies, that does not an extrovert make.
What I am saying is that you don't need to be a Red Bull swilling, partying, socialising person to do these kind of jobs. If you are intelligent. If you are a confident speaker. If you have a competent team behind you it doesn't matter how you recharge it just matters if you want to do it all not.
Being an introvert doesn't have to hold you back. In fact, it can even be an advantage. Use that advantage to better both yourself and the people around you and you will win every time.