Hello! Wow you sound a lot like I was in college. I went on to the big university and I was sooo scared to do anything I would be paralyzed at times, I dropped a lot of things I started because I always felt so wrong. I had a hard time coming out of my comfort zone.
So for me I had to break it down, okay the world isn’t going to end if I don’t do this or that but if I do nothing, nothing will happen.

So as you clearly want to change and find change hard, start small, write out a goal list or future plans and figure how you will get to that point. Like maybe you want to go to the university but afraid to leave, well maybe start with exploring the area of where you school will be and see what fun things are around, like stores your like, restaurants, cool areas to hang out. Slowly start pushing yourself to do things you normally wouldn’t do to get out of your comfort zone. You don’t have to like everything but it is good to experience new things and open your horizons.

One random thing to do is to say hi to strangers but don’t expect anything in return, trying new things out of your comfort zone will expand your confidence in yourself.