I can very much relate, I was a big overthinker while I was rushing squadrons. People say "just be yourself" often, which is great advice, but what helped me the most was to have confidence in myself. I would listen to some music real loud to get hyped on the drive to the squadron, I would tell myself to be confident, and this sounds stupid, but I had a kind of "pre-game" routine to get myself hyped up before I got out of my truck. Do what you need to do to get in the zone, once you are confident and holding your head high, the rest will follow.
That being said, don't be arrogant, but dont be a wallflower. No one can tell you exactly how to act in certain scenarios, it just comes with experience. Know that many people have been in your shoes, including the pilots you meet, so they understand some awkwardness or mishaps.
As far as visiting often, I would try to visit every drill or every other drill