Come on out and join us! I did my first track day in 2008 at age 53, and am a full-fledged track addict now. My experience is that everyone was welcoming and supportive, and continues to be despite my near-flat learning curve. And I'm havng more fun at this than I ever had on the street.
There are a number of us old farts(joking - call us older folks) out here. You won't be alone, and you will be welcomed. Bring a willingness to learn, your basic friendliness, and prepare to enjoy yourself. In fact, I'll be at pretty much all the MW days starting May 1, and you are welcome to pit with/next to me. In any case, find bike #83 and say hi.
See you out there. Or better yet, come to the Bash at the end of January and meet us in a totally social setting.