Get your children involved, as their age allows. Let the older ones do the background research to stretch out your time. There are copious resources on the Internet or in your public library to speed you. You may not have everything, but use what you have. Bit by bit you'll get the job done.
Action dissipates anxiety.
Ignorance brings fear, knowledge calms fear. That goes for you, too. I have been racking my brain for ways to be productive and earn a living in a world without electricity, should worse come to worst. Buy her a treadle sewing machine and hundreds of spools of thread and notions and cloth. Acquire the tools of your trade - the manual tools of your trade.