As a widower with two teen kids and I being a truck driver, my pastor's wife attempted to school the kids but finances didn't keep up with expenses and the last two years of HS was in a government indoctrination center.
Late blooming can be an issue with the elect, though sometimes it has to do with trials that they must go through.
If they’re elect they’re elect and whatever spiritual cruft they may accumulate when young will be shucked off before they get to the pearly gates.
But actually practicing the use of the grace of God should be the name of the game. It’s really that simple when brought down to its fundamentals. And we should not be shy to be audacious. Children should be told that they will meet grim people who don’t know God, and they should as a first effort smile and make an effort to pass on the grace of God. (As second efforts when faced with persistent opposition, they can avoid the problem, or sometimes rebuke it even though they may get pushback at first.)
“We are ‘Independent Baptists’” tells me little except that you may have ready access to material backing up the world view I mention. However until this material is used as intended, it still does little good.