I had a cube back in the very early 1980s, and I eventually bought the "Simple Solution to Rubik's Cube" book to learn to solve it. My memory is that the method presented in that book was not simple at all, but keep in mind I was a kid. I did not pick up a cube from sometime in the 1982 to 1984 time frame until late 2018, when my 6 year old son saw another kid with one at school and asked for one for Christmas. I thought it was a dumb present, but parents want their kids to be happy, so I bought a Rubik's brand, thinking I was paying more for a higher quality item.
At first my son just played around with it, but there was an older kid at school who could solve it, and my son wanted to learn. I could not remember the last layer algs from my youth (and maybe I'm just falsely maligning a book due to bad memory, but my recollection is that some of them were 30+ moves long), so I could not solve it either (I could solve two layers upside down from the way pretty much everyone reading this does it). My son watched the Cubicle's online videos and learned to solve it (upside down from the way I thought was correct), then almost immediately substituted the beginner last layer technique from the J Perm videos. He got hooked, and being his dad, I got hooked, too. Less than 8 months after he got that 3x3 for Christmas, we can both solve 2x2, 3x3, 4x4, 5x5, Pyraminx, Skewb, and Megaminx. Master Pyraminx and Square-1 are next on our list. He has been to one competition, and we hope to go to more.
It still takes me about 2 minutes to solve 3x3, primarily due to bad eyesight, but he can solve it in just under one minute using LBL.