Some brief comments/suggestions for the final submission:
README file is missing LLM usage statement
Title could (and should) be reconsidered.
Pay attention to grammar and spelling. I recommend tightening the language. No need to narrate steps taken.
Data cleaning sections/descriptions belong in appendix. Keep only meaningful aspects of data processing which are crucial to reader understanding (e.g. note if a variable of interest was created as an aggregate of multiple other measures collected in the data).
Some brief comments/suggestions for the final submission: