If they're reading this, they're already the type of person trying to find success. It's important to remember that a lot of these results about families and finances are _statistical_. There are a myriad of other factors, whether known or not, that lead to success and anyone reading this who thinks they aren't cut out for success should never let that get to them.
I also grew up in a similar family to you, but (other than the crazy amount of times I've gotten lucky) I distinguished myself from my peers in my income-depressed area by being excited and interested in trying to get out of my circumstances. Most didn't. So if you're reading this and worried you aren't as far ahead as your peers, don't. The fact that you're worried will go a long way.