Only engage in what activities your comfortable with. Over time maybe you will be in a better spot to do things together but right now is probably too soon. Take this time to heal emotionally and mentally. You will know when the time is right.
I agree NC/dark outside of kid or financial matters and don't look for opportunities to engage. I always try to be happy and upbeat, like nothing is wrong but I keep the conversations short, try not to engage in too much dialogue and I don't linger. I never ask her questions about what she does, where she goes, etc. I also try not to ask any who, what, when, who, why, where type of questions.