I did try to learn from my grandmother when I was a kid but it didn't stick. I don't think I had the manual dexterity, when I looked it up on YouTube as an adult I didn't have too much trouble with it.
I had forgotten learning from my grandmother but I found some of my old notes and things at her house the other week that been stored away for the last 30 years or so.
Now I learn from YouTube and certain books. How to knit socks that fit, jumper knitting handbook type stuff and the Japanese knitting stitch Bible.
I started with crochet and moved onto knitting. Now I much prefer it and how versatile it is