Some people cope with their illness by not wanting to know anything about it, or not wanting to talk about it. This can be a very good way of dealing with cancer for many people.
If that is the way you feel, then it can be helpful to say quite firmly to the people around you that you would prefer not to talk about your illness, at least for the time being. It may be difficult for your family or friends to understand that you need some time to deal with what has happened.