Maybe a good place for you (all of us, truth be told) to start is to forgive yourself for the blame you've put on yourself for being an introvert and start to embrace the person you have obviously always been, claim it as your own, unique you. Just rest with that idea for a while, that it is perfectly okay to be you, no excuses or explanations necessary.

Here is a link to a good TED talk on introverts and what they have to offer:

https://www.google.com/url?sa=t&rct=...xsu-rEnzcyBhJQ

When we come to real acceptance of who we are, the authentic us, then the rest of things like what to do with our time/interests tends to fall into place. Self-acceptance will make it a wee bit easier to do those things we genuinely have an interest in doing but feel uncomfortable with at first because we are more grounded.

It really isn't up to me to judge but it doesn't sound like there is anything 'wrong' with you, other than the way you are viewing yourself. I love introverts and my personality leans in that direction also :-)