When the plane goes down and the oxygen masks release, there is a reason why they tell you to put yours on first. Get your priorities sorted. And put them in order of things that cannot look after themselves without your help.
Work on yourself first. Work on your health, mental state, resilience.
Then look after your wife or partner. Then your children. Don't reverse these as they cannot look after themselves.
The same is true for any project or business or art.
As Tim Ferriss says, what is the one thing that if done will make everything else easier or irrelevant?