Your dream reflects a mix of your current experiences, emotions, and anxieties related to your academic journey and personal life. Here's a detailed analysis of the elements in your dream:

1. Starting as an IIT Student: This symbolizes a new beginning or a significant transition in your life. The excitement and hype you initially felt represent your hopes and aspirations for this new phase. However, the absence of the JEE clearance suggests feelings of uncertainty about how you arrived at this point, possibly indicating anxiety about the pressures of expectations placed upon you.
2. School-like Environment: The resemblance of the IIT building to your school may indicate a longing for familiarity amidst change. This could reflect a fear of the unknown or a desire for comfort in a new and possibly intimidating setting. The initial loss of enthusiasm might represent your realization that the pressures and challenges of this new environment are similar to what you’ve faced before.
3. Socializing with New People: The opportunity to meet new people and regain some enthusiasm suggests that you are open to making connections and finding support in your new environment. This reflects a natural human desire for community and belonging, which is essential especially in a high-pressure academic setting.
4. Elegant Food Court: The exquisite food court represents abundance and the allure of new experiences. Your initial thought that it might be exclusive indicates feelings of self-doubt or insecurity about fitting into a new social circle. The desire to dine there instead of elsewhere may symbolize your aspirations for a more fulfilling and rewarding experience in your academic life.
5. Dropping the Glass: This incident reflects your fears of failure and the consequences that could arise from mistakes. The connection to your chemistry lab and the threat of fines shows how these anxieties manifest in your subconscious. However, the polite waiter who helps you signifies that you may have support systems in place that can aid you when you make mistakes, reminding you that not all failures lead to harsh consequences.
6. Searching for Cycle Keys: The recurring theme of losing your keys and searching for them in the basement can symbolize feelings of being lost or unsure about your direction in life. The keys often represent control, access, or the ability to move forward. Losing them in the dark may indicate feelings of being overwhelmed or confused about your next steps.
7. Darkness and Calmness: The darkness and your calmness in it can be particularly telling. It suggests a sense of resignation or acceptance about situations you feel you cannot control. Instead of panicking, your aimless searching might reflect a sense of futility about the pressures surrounding you. It could also indicate that you are in a phase where you are trying to navigate through uncertainty without allowing fear to take over.

Overall, your dream mirrors your current life situation, especially the pressures and experiences surrounding your academic journey. It emphasizes the themes of new beginnings, the fear of failure, the quest for social acceptance, and the struggle for direction amidst uncertainty.

Advice: As you navigate this transitional phase, remember to seek support from peers and mentors, embrace mistakes as part of the learning process, and take the time to explore your passions and interests. It’s important to maintain a balance between ambition and self-care, allowing yourself space to adapt and grow in this new environment.