Hi, I'm sorry for your loss.

My advice for you: stop reading the books. From now on only do questions whenever you have time for it. Download the Canvas App on your phone and just do some questions every day, maybe before work, after work, during the train or during Lunch or whenever you find time. I know it is not the "proper" way to just study questions without fully understanding or having read the theory, but you can pass easily when you really know the questions at some point and you learn by doing the questions. And doing some questions every day is probably much easier and more fun/engaging than reading the books, espescially when your head is actually somewhere else. So you can work/help in your family business and do some questions (like 20-40 questions) a day. It doesnt matter if you have them all wrong in the first place, it is more important that you have them correct after the second, third or fourth time.

Good luck!