Want to connect with my Judaism, but feel anxiety reaching out

I grew up in the southern US without any sizable Jewish community around me. My family is extremely secular – really the only Jewish thing we did was celebrate Chanukah. I love being a Jew, but whenever I enter Jewish spaces, I feel my limited exposure to Judaism makes me unable to participate in any prolonged conversation. I have since moved to a much larger city, and I would love to get in touch with the local Chabad, but my anxiety spikes through the roof whenever I think about picking up the phone and giving them a ring.