I'm an introvert, but I exhibit the characteristics of an extrovert.

That means you are in between, which makes you an ambivert. That’s my type of personality too.

You should actually work on it, life is actually beautiful and fun and you should explore it. However, you will feel like you don’t belong in most spaces when you go out, just try to observe and watch. With time, you should blend in. I have not been able to, but I do well with people I know very well.