Its strange. My parents, whilst DIY capable themselves, never showed me anything...
Moving out with my GF and suddenly NEEDING my car was a big push to learning how to change the oil, spark plus, and other basicish things I felt comfortable doing. The internet is fantastic for that.
That gave me the confidence to do a few more things. Change a broken light switch, a tap washer, fit a washing machine instead of paying currys etc.
All in all, yeah, I'm kinda bummed my stepdad didnt show me the ropes a little. Then again, I was a lazy SOB, didnt do anything for them, so its a 2 way street I guess?