Internet is full of crackpot sites with allcaps white text over a black background, and also slick university pages that overhype experimental treatment. Approach both with caution. In spite they may be wrong, sometimes they have some hints of interesting questions to make to your medical doctor.
I recommend to begin with Wikipedia, but I guess it's a rabbit hole you already entered. There are other good sites like Mayo Clinic, but they have more good generic info that a deep discussion about corner cases. The problem is that each cancer is very different, so each one is a corner case.
I think it's important to understand the different tradeoff. There are some horror stories about selling the family home to pay a procedure that extend the expected lifetime a few month. And there are also good case where after a surgery + rays + chemo there are 5 or 10 years without any problem, and then another surgery/treatment extend the life time even longer. It's important to understand the difference, so I think it's useful to read as much as possible to be able to talk with the medical doctors.