Don't just sit there and worry. Be proactive. Do something - anything - about what's worrying you so you can gain information, focus and control over the situation. I've suffered a great many catastrophes in my life. Most of them never happened.
I know from having had a child, and from having been a child myself, that children will copy you. So, the best way to get them to read, is to read. The best way to get them to do anything is to do it yourself, and they will absolutely copy you. That way, you don't have to worry about what's supposedly age appropriate, a child will pick something up when the child is ready.
If there is no solution to the problem then don't waste time worrying about it. If there is a solution to the problem then don't waste time worrying about it.
Do not be afraid to throw yourself on the Lord! He will not draw back and let you fall! Put your worries aside and throw yourself on him; He will welcome you and heal you.
Once writing has become your major vice and greatest pleasure only death can stop it. Financial security then is a great help as it keeps you from worrying.
My particular worries on any given day - how I'm doing in the polls or what somebody is saying about me... for good or for ill - isn't particularly relevant. What is relevant is: What am I building that lasts?