First time researcher — where do I even start with the GLP-1 family lit?

Background is software, no bio background but I've been reading about peptide research for about a month and I'm overwhelmed. The GLP-1 papers alone are thousands.

What are the 5-10 must-read papers if I want to understand semaglutide → tirzepatide → retatrutide as a progression? Looking for landmark trial papers, not reviews necessarily.