I would like to ask. I am an introvert but I don't know how I can fix this. How can I fix this about me?

You simply cannot. But hear me out. It isn't a bad thing to be an introvert. I am an introvert myself! You can still be very social as an introvert. It is a part of who you are. You can't easily change the color of your eyebrows natrally.(besides dye, but that is artificial) and you can't change whether you are intoverted or extroverted. This isn't a bad thing at all and embracing it helps a lot with dealing with it. Being an intovert is normal! But if you want to enhance you social skills, try hanging out with more extroverted people/friends! Join a club, or social gathering. Talk to teachers, and don't be afraid to ask questions. Wear what YOU want. And look like a boss in it.