How can an art major with zero experience and talent become a singer, dancer, and actor?

Do you have an active community theater scene?? You might try participating in that while you figure out your next steps. With your art background they may be able to utilize your current skill set to help out with much needed graphic design, set/costume work and at the same time give you opportunities to try out for performance parts. I’m guessing you will need to do something to earn a living once you graduate, doing community theater - whether onstage or behind the scenes - may give you skills, connections and knowledge of where to go to hone your acting/singing/dancing skills. Community theaters also often offer workshops for stage skills like improve, comedy, etc. and may even offer classes for developing monologues and auditioning skills. Do you have talent/modeling agencies in your area? They also offer workshops in acting and film skills. Can you take dance classes? It sounds like money is an issue for you. If you can’t afford to pay for lessons and classes, your best bet may be “paying your dues” by doing stage-work for free in exchange for experience. Have you had any dance, vocal or acting training in the past? Others on this forum may be able to help if you share a little bit more about what kind of theater background you have, other than “passion” for MT.