Totally agree with all the comments above @SharrynB.
I told only family and close friends. I wanted some privacy to process it all but I did see a few people over the yr of treatment. It depended on covid and lockdowns as to whether I saw friends etc.
I did loose a friend or 2. Some people you will be happy to take on this 'journey' with you and hopefully all you want to share it with you will do just that. Just be aware that some may find it confronting and hard to deal with.
Make yourself the priority. I made myself the project manager of my health. I worked with my health team and took their advice. I exercised, ate well, took up meditation. I have always done yoga and pilates so did that when I could. It's ok to do nothing too. It can all get exhausting running to appointments and treatment. Don't forget to just sit or rest. You deserve it. I am sure you have done everything for your family so this is your time.