I had the same question so two years ago I used the SEARCH function on FR and found some excellent advise.
1) Get an insurance agent
2} If they push you towards a C plan change agents.
I also have G, BCBS, and it’s excellent.
All the Medicare plan C’s are NOT MEDICARE and are not bound by Medicare laws...My agent explained the situation to me very well even though she earns 5 x times the commission on the C plans.
Best of luck to you!
+1 for BCBS Plan G. In our 70’s and always been happy with them.