Your dream is rich in symbolism and themes that reflect various aspects of your life, including teamwork, personal identity, and perhaps some underlying anxieties or desires.

1. School Setting: The dream takes place in a school, symbolizing learning and personal development. It could imply that you are currently in a phase of growth or reflection on your past experiences, particularly relating to teamwork and friendship.
2. Throwing the Weapon: The act of learning to throw a weapon could represent your desire to master a skill or tackle challenges in your life. The idea of it coming back to you might symbolize the concept of consequences or that your actions have a way of returning to you.
3. Team Dynamics: Your observation about having fewer people on your team could reflect feelings of isolation or the pressure of competition in your waking life. The boredom you felt might indicate a desire for more meaningful connections or engagement with those around you.
4. Zombies: The zombies attacking you could represent feelings of being overwhelmed or a sense of danger that others around you are not acknowledging. This might relate to situations where you feel ignored or unsupported when you need help.
5. Christian Art Lesson: This part of the dream could symbolize a search for meaning or creativity in your life. The use of DJ equipment to create art suggests a desire for self-expression but also raises questions about authenticity, especially when someone else copies work. This might reflect concerns about originality versus imitation in your own endeavors.
6. Body Image and Health: Your thoughts about calories and steps indicate a preoccupation with health or body image, which is common for many individuals. The black crop top over the school shirt might symbolize a blend of your past (school) and present (personal style), perhaps reflecting a struggle with self-acceptance or your identity.
7. Cafeteria Search: Looking for protein-rich food in a fast-food dominated cafeteria could signify a desire for nourishment that is meaningful or beneficial, but feeling surrounded by choices that don't align with your goals. This may reflect current challenges you face in making healthy decisions in your life.

Overall, your dream suggests a journey of self-discovery, the importance of support from others, and the challenges of navigating personal and social expectations. Reflecting on these themes in your waking life could provide valuable insights into your feelings and aspirations. Consider focusing on building connections and expressing your unique self more fully.