@turbo93 There’s no secret website, but each college has an academic bulletin that spells out what’s required:
bulletins.iu.edu/iub
Most departments also spell it out based on major.
Once you’re in the Student Information System (SIS) used to register, you can view your degree map based on college and major, and what classes you still need to take each semester.
I know you’re looking for a simple plan, but there are just too many choices at IU and one map doesn’t work for everyone.