Civics00, you are on the right path, don't give up. I struggled with these same issues, but it does get easier as you get older, we introverts are often late bloomers. I read a book called "Quiet, The Power of introverts in a World that can't stop Talking" It makes the case that extroverts are mire likely they get their ideas accepted, introverts are more likely to have better ideas, because we think things through better. You should check it it. I have it on Kindle if anyone is interested.
I may not have 300 Facebook friends, but I cherish and enjoy the ones I do have, and I greatly enjoy my solitude, and don't function well if I have to be around people too much. After years at the cube farm, I am lucky to have a small business that I do out of my home, which is perfect for me.