I can identify with your feelings, Cabal. I, too, was raised Catholic and can no longer find any useful meaning in practicing it.
I guess I went thru most of what you’re going thru a decade ago when I decided to shed a possession-oriented spouse, who “acquired” faster than I could earn. I feel fortunate to be on the other side of this “crisis” now, in every way.
Don’t worry about your kids. They will find their way. When they do, you can make your OWN life, in the way YOU desire.
Like you, I am not interested in “striving” anymore after watching three members of my immediate (original) family work themselves into an early grave, ignoring signs of trouble to stay “productive” and “working.”
I think most of the suggestions here are good, except I’d just like to add yoga and Pilates. And the ability to say “no,” when the request does not suit you. I’ve also studied the Tao te Ching which has opened my eyes to a whole new way of looking at events and situations.