Reddit mentions of Grieving with the Help of Your Catholic Faith

There's a couple of books on this that might be helpful - [this one] (https://www.amazon.com/Will-Remember-You-Catholic-Through/dp/0819837040) and also [this one] (https://www.amazon.com/Grieving-Help-Your-Catholic-Faith/dp/159276200X)

A friend of ours, a father of three young children, died last year from cancer. Like your mother he had been living with a fighting the illness for quite a long time, but he thought he still had some months left so they had only begun talking to the children about their father's illness and what it meant, and then a fortnight later he was gone. I think that while this was a very merciful way for him to go in the end and he didn't really suffer much, it was a real shock for his wife and children. We visited with them recently and the two younger children (who are now 4 and 2) still seem very confused and angry, while the oldest (now 6) is very quiet and withdrawn. I think you are right to be proactive and address this with your children now and prepare them to whatever degree you think that can understand and cope with, to lessen some of the shock. At this stage I wouldn't worry too much about getting into the framework of belief with them at this stage, because they are very young and close with their grandmother, but maybe they could think about the different reasons that we pray, not just asking for things / intercession, but to seek comfort and to give thanks for all the special times they have shared with your mother and just to feel close to God. Prayers for you

I'm sorry for your loss. Grief is a weird thing. It never plays out the same every time. It's unpredictable, there's no way it "should" be and you never get used to it, although you do recognize its familiarity after going through it enough times.

You might find this book helpful. Also, is there a grief support group at your church?