This dream is rich in imagery and emotions, and there are several elements that may symbolize your current experiences or feelings.

1. Meeting Tyler the Creator: This could represent your desire for inspiration or creativity in your life. Tyler, as a prominent figure in music and art, might symbolize your aspirations or the influence of creativity on your personal identity.
2. The Cafeteria: Cafeterias often symbolize community and social interactions. Your feeling of not being alone, despite sitting alone, suggests a comfort in your independence or a sense of belonging that doesn’t require constant social interaction.
3. Children Outside and the Storm: The scene with children playing outside and then being trapped by a storm can reflect feelings of chaos or anxiety in your waking life. The storm might symbolize external pressures or challenges that you feel are affecting your social circle or community.
4. The Teacher’s Command: The teacher locking the door could indicate feelings of protection or authority in your life. It may suggest a need for structure or a warning about external dangers.
5. Lightning Strikes: Lightning often represents sudden insights or revelations, but it can also indicate fear or a disruptive force. The fact that the children couldn't return inside might reflect feelings of vulnerability or being overwhelmed by circumstances beyond your control.
6. The Thunder God and Billie Jean: The connection to Billie Jean suggests a link between your dream and cultural references or personal memories. This could symbolize the influence of past experiences on your current feelings or decisions.
7. Caring for a Robotic Baby: Building a crib for a robotic baby might symbolize new responsibilities or projects in your life that feel artificial or overwhelming. It could also reflect a desire to nurture creativity or innovation, even if it feels unfamiliar.

Overall, your dream may highlight themes of creativity, independence, vulnerability, and responsibility. It suggests a need to navigate external pressures while maintaining your sense of self and perhaps a creative endeavor. Consider reflecting on any current challenges in your life and how you can approach them with a balance of independence and connection to others.