Sloth might be my spirit animal
Ok, ok, NOW I get it!
Follow up question re: family - does the new survivor have the ability to earn more weapon proficiencies before they earn 2 hunt xp, or do they start with the bonus amount and gain more after they come of age?
Yes, you can nightmare train a new survivor who inherited spear weapon type and 2 points if proficiency.
This is allowed because the only condition to earn weapon proficiency is to have a weapon type; normally you get it at age 1 milestone, but with Family innovation you are born with it, and you can use it as you see fit.
Weapon proficiency is not related to hunt xp, this is why they are listed separately in two different lines in the aftermath.