Jack's dad was a pirate, as we know 😄 Jack was born during a typhoon, I believe, on a pirate ship, and somehow or other he ended up being a cartographer, and then eventually sailed for the East India Trading Company....
He worked for Beckett, hauling cargo and such, but one day he refused to ship some slaves, so Beckett branded him and sank Jack's ship...Was it the "Wicked Wench" or the "Wailing Wench"? I can't remember. Something Wench was the name of the ship...
So Jack made a deal with Davy Jones, raise the ship from the depths and he'd get to captain it for 13 years. When DJ raised the ship, Jack renamed it the Black Pearl and you know, sailed around until the mutiny, and then he spent 10 years trying to get the ship back.
That's all I know about Jack's past, according to Disney. It's in the game, I think. And um...maybe one of the visual guides. I'm kind of fuzzy on details right now. 😄
As for Jack being educated, Will is educated and so is Norrington. Does that mean W/E forever too? 😉