I've picked up some knowledge from a lot of adults in my life. Often, what TO do, but sometimes, what NOT to do!
I'd say that the two biggest influences were my two Granddad's. My maternal Granddad saw that I was good with handling money, and saving money, and told me that I was smart enough that I should look into something that paid better. He didn't understand stocks, mutual funds, etc, but he had a feeling that I would be able to figure them out.
My paternal Granddad used to get these money magazines, like Kiplinger's or something like that, and he suggested that I look through them. He was also the type that didn't really understand individual stocks and mutual funds, even though he got those magazines.
Both of my Granddads also retired fairly early. My maternal Granddad, at 55. He took early retirement from the Federal government, so he could take care of Grandmom's favorite aunt. She died within a year, but Granddad never felt the need to go back to work. He kept busy by turning a good chunk of the back yard into a garden...farming was in his blood. He also did "shade-tree" mechanic work, at least until the cars started getting more complicated and harder to work on in the late 70's (downsized cars with cramped engine bays, increased emission/electronic controls, etc)
My paternal Granddad retired at 60, after 35 years with the Pennsylvania Railroad. Grandmom retired the same year. They had a cottage near the Chesapeake Bay, about 45 minutes away, that kept them busy. And six grandkids. However, I also remember them spending a lot of time watching soap operas in the afternoon.