Hi, Tom .... I'm another Tom.
I was diagnosed with inoperable Stage IV non-small cell lung cancer in early October 2020 and started immunotherapy (Keytruda) later that same month. During the first course of Keytruda I also had a lighter version of chemo. I had no side effects from either and my results were not typical but I will tell you that within months there was no longer and evidence of disease.
The genetic testing is critical!!! So many of the new therapies are driven by DNA results. Also, have they biopsied yet? That, too, is really important.
last word of advice: you've just been told you have cancer and you want things to start moving at the speed of light but be patient. The tests they are running now are critical to your future treatment and your future treatment is critical to controlling the cancer.