Taking acid or mushrooms is a very life changing experience. Do not expect to come out of either of those trips the same person. By that I mean your intellectual understanding of a vast amount of things such as energy, karma, lifestyle, culture, art, & music to name a few is expanded & helps you to lead a more plentiful life. Remember that LSD lasts around twelve hours and mushrooms six. Make sure your trip is undisturbed by people and situations you do not want to deal with (i.e. parents, ex-boyfriends, ex-friends). Be sure to have someone sobor with you your first few times, someone you absolutely trust and can take care of you in any situation that might scare you. Through my personal experience I found that LSD is much easier to control your emotions on and mushrooms your emotions are very vehement. (i.e. scared, gleeful, then confused, then understood). Just make sure you are comfortable where you are and indulge to the fulest. Psychedelics changed me into who I am today and would never take those experiences back. And to add to others age doesnt matter, but level of maturity absolutley does. I highly recommend you read The Psychedelic Experience: http://www.erowid.org/library/books/psychedelic_experience.shtml