Thoughts on having visible Judaica on my person and in my office?

Do you think it's appropriate for me to wear a visible Magen David (Star of David) necklace in the therapy office? Would a mezuzah on the doorpost (a small slanted ornament with a Hebrew scroll inside that is meant to protect a home or space) be too much or too alienating? I don't know how much of myself is appropriate to bring into the therapy space when it comes to Judaism.