I'm technologically challenged too and it's funny that in my office, many come to me with their tech, blackberry, software questions as though I'm the expert. My guess is that I'm not intimidated by the equipment, nowadays the equipment is so compact and the connectors only fit if they're in the right connector. I'm unclear if when you're experiencing anxiety, if it's due to a malfunction on the equipment after you've set it all up or are you stumbling as you connect the equipment for projector. The short answer to your question, you will diminish your anxiety when you feel more confident. You will feel more confident when you learn to get support for problems beyond your present expertise or when you switch jobs. Good luck and try to have a trusted reliable coworker you can call at moments like those.