I realize this ask might be a bit of a hassle...
Could you change and add scenes when it comes to the initial training days with MC Father? As an example after every training right now I'm getting 60 points whether it be strength, endurance or agility... So after the first training with my characters father he should seem a lot more impressed and maybe decide that the huge pebble is the one I need to start with instead of the medium sized. After all the way the character's father is speaking 20 is a normal adult strength so 60 should be something far beyond that, especially when by the second training those stats would be 120 each.