I'm no longer a single digit player but when I was, it was purely from short game practice. I chipped into hula hoops or trash cans in the yard. I would flop shots over my kids' swing set. I would play "bocci" with golf balls with my friends. At my best, I shot a 71 with one GIR. If my approach game had ever been on par with my short game and driving, I would have been scratch but as it was I peaked at around 7.
Perfect example of the limits of focusing too much on short game. Shooting a 71 with 1 GIR means you had an absolutely dominant short game, especially for an amateur. Sure that was a best of sort of day probably without any super unlucky breaks on spot or lie when you missed all those greens, but it still shows you did indeed develop a deadly green side game. But even with the best short game of probably anyone you ever played with, you still topped out at a 7 HC cause your full shot game never got the loving your short game did!
Not a dig on you, by the way, especially with kids. Obviously it's a lot easier to step out back and practice short game shots for a bit way more often than you can get to a range. If this is still your situation, let me hawk the BirdieBalls I use and absolutely love. 3W goes ~50 yards, better info on trajectory, shape, and contact than any other practice balls I've used.