Sorry to hear of your loss.
I would decide exactly what hobbies I am going to pursue.(1-2)
Theres not enough hours in a day to do them all.
Then sell/trade/donate all the other craft stuff you have.
This will help you eliminate about 75% of all the other craft stuff.
Then, you can start organizing the hobbie stuff you have decided to keep. This will allow you devote your time on a hobbie you love. And not be overwhelmed with all the stuff
that you have accumulated with your things and your mothers things. Happy Quilting!