The Difference Between Shyness and Introversion

I think at school I felt like I was shy and more reserved than the average person but I didn't have an awareness of what introversion was or what that meant. So there's this friction between wanting to be involved in things and wanting to do things because you were shy or indeed introvertedyou didn't actually put yourself forward for those things. Do you have an example? I suppose one example is that I've always been quite a sporting person and played all sorts of sports but I was always really reticent to join teams and I didn't really join it. Many teams taught when I was at school even though I was really into football for example because I just felt really uncomfortable with going