STAGE 4 KIDNEY CANCER

Hello my partner has just been dx with stage 4 kidney cancer in both kidneys with mets to liver.  He is waiting to meet his team and is expected to be put on immunotherapy withint a few days, which I understand has shown great promise.  I would welcome hearing from anyone else on here who has been diagnosed with this particular cancer.  I am a 16 year survivor of nasal septum carcinoma and was successfully treated with surgery, chemo and radiation.  My world now has come crashing in around me, and I can't seem to stop crying.  This has happened to the most beautiful/kindest and funniest person, who I've been with for almost 35 yrs.  I am trying so very hard not to make this about me and help him by trying to stay positive.  Has anyone on here had this experience with Stage 4 kidney cancer?