This is exactly where I was for 10 years - until I learnt how they actually work (age 30+). Since clicking with these basic things - I have enjoyed my job much

This is exactly where I was for 10 years - until I learnt how they actually work (age 30+). Since clicking with these basic things - I have enjoyed my job much much more. However - at what age they should be introduced not sure - 10, 15, 31?