Why is my brother afraid of the new co-workers?

Name: AaravDate of Birth: 12th February 1996Place of Birth: PuneTime of Birth: 6:50 AM

In the workplace, my brother is anxious to meet new workmates. He prefers to avoid conversations, fidget and finds it difficult to speak up. I feel worried for him. I believe that placement of Moon or Rahu-Ketu would render him socially sensitive. Any hope I hold is that astrology can show him how to be confident and relaxed in his line of work.