It's good to have a clearer idea of what's what, it makes dealing with the whole sudden business a bit easier. Great too that you are so supportive.
Everyone needs to find their own way through this one though, and the paths are many and various. Like @kezmusc, I wanted things to be as normal as possible, at least at first. I worked through chemo (67) full time and while I can't say I enjoyed chemo, it wasn't quite the nightmare I had imagined. I too went to sessions by myself and valued the peace and quiet - and the occasional unplanned conversations with someone else having treatment. I made some changes about what I wanted in my life (a new job, resumed singing) a full 12 months after diagnosis and I feel poised to make another soon (6 years on). Cancer's a bit like having a baby - you are still exactly the same person except you are not! You are less likely to make assumptions about time and how you spend it. You may want to be more active (travel, exercise) or concentrate on your inner self. The first few months are a blur of treatment, new language and experiences. Even if, like me, you come through it well and positive, you do tend to think about things just a little differently. Some space and time to reflect and embrace those changes (they can be good changes) are important as well. Best wishes to you both.