Maybe a bit off topic but other have posted they are looking for Medicare plans.
I recently turned 65 and researched Medicare Supplement (Medigap) plans, and Medicare Advantage plans quite a bit on the internet (what a headache) as my retiree health insurance would expire at age 65. Also contacted a few insurance brokers and even an independent insurance agent to get quotes, suggestions, and information.
During that research, one site that really impressed me with explaining Medicare, how to decide whether a Supplement or Advantage plan was right for you, and the detail on how these plans work as well as what to look for when choosing a plan and how to compare plans was
https://medigapseminars.org/ .
That site has many, many videos and articles. What was also impressive is they show the sources for facts they use to draw conclusions and compare plans. I also watched many of the videos and read many of the articles before even contacting them. They also research the insurance companies to find those they believe will most likely have the lowest total cumulative premiums/costs over the life of the health insurance policy (granted this is more uncertain but at least they try and apparently have the skills to do it). There is no fee to use them as they do get paid a fee indirectly thru the insurance companies/policies they recommend if you go ahead and get one thru them.
Now this site does take the approach of first determine if a Medigap plan would work for you and then if it doesn't fit for financial or other reasons, then look at an Advantage plan.
I ended up choosing a Medigap plan as I did not want to be constrained to networks or getting pre-authorizations, even though I am healthy now, and financially it was feasible.