1. You are almost certainly going to overwork yourself trying to do it all at once. What degree is it? Have you considered a combination flying/degree course, such as the ones at Kingston, Bucks etc?
Being an introvert is not necessarily an advantage. You despise loud noises with lots of people? Good luck being based at an airport. You are going to have to get on and work, sometimes in a small space for hours, with lots of people. Airlines tend to look for stable extroverts.
2. No.
3. No idea.
Why are you bothering to take years and thousands out to do a degree if you want to become a pilot? You don't need one.