How do I show my reserved side as an adult?

I am an introvert that fakes confidence and like my few athletic hobbies, alone time, and videogames. I have moved every year since college cause there is something that was just missing or i was getting too buddy buddy with the aquantencies I made. Luckily my career is temporary IT contract positions through a third party project team. I am lucky to have never had to work in a set office or socialize in person with coworkers/commute to work. The issue is today is the first day of my second lease in my current location and nerves hit hard. I miss the feeling of a fresh start and now feel scared that i may have to share more personal details with teamates or get to know people for real. I have ran from this for 7 years and feel like they will discover I am actually introverted.
How do I show my reserved side as an adult?
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