Here's a great 40 minute gentle introduction to retirement planning from a Wisconsin Public Radio call-in show.
https://www.wpr.org/shows/financial-planning-your-retirementLarry Meiller is the long-time jovial host of a WPR call-in that covers a wide range of topics. I catch it sometimes when I escape the office to run errands.
This episode, with guest expert Frank Armstrong, espouses the Mustachian/Boglehead approach to retirement planning.
They also cite the admirable Richard Thaler.