Hello @stonyah and welcome to Mayo Connect. I can understand your fear of beginning treatment. Getting a third opinion at the University of Michigan is a good idea. I live in SE Michigan and I am also seen at U of M for a different type of cancer.

I would encourage you to post on Connect's Kidney Cancer support group. In this group, you can share these experiences with others who can then share their experiences with you.
Here is a link to one of those discussions,
--Wanting to Connect with Kidney Cancer Patients
https://connect.mayoclinic.org/discussion/wanting-to-connect-with-kidney-cancer-patients/
How are you feeling, @stonyah? Are you fatigued or do you have other symptoms?