I attended a four year school. MD's may insert needles with no formal acupuncture training. I would first consider whether I thought the acupuncturist exemplifies well being. I would make note of how easy it is for me to communicate with them. You could also ask about where the practitioner trained, how long the training was, how long he or she has been in practice, if he or she is licensed, and what experience the practitioner has had in treating your specific ailment.
Men often are comfortable bringing a pair of loose short pants.
Remove watches and jewelry. Maintain good personal hygiene to reduce the possibility of bacterial infection. This is especially important for the first few visits. Make sure I am informed about what they are. Ask me any questions you have along the way so that you can get the most benefit possible from the treatment.