I started being interested in fantasy rpgs from the D&D cartoon and nintendo RPGs like Dragon Warrior and Final Fantasy. A friend borrowed the 1E PHB, and we read it cover to cover (even the spells). My brother started playing in high school, but he wouldn't let me join. Instead I took a couple of my friends and made my own game based on what I remembered from the PHB. My brother's DM found out, checked it over, and was impressed. He immediately invited me into his game.
Back then, the rules were almost completely in the DMG, so players just knew how to build characters and understand a few concepts. To learn to play pretty much required joining an existing group, and being a DM needed someone to teach you. It became an apprenticeship situation, where someone teaches you, so you look for potential players and DMs to teach them. The basic game did a much better job of teaching DMs, but it was still better to learn from another.
Back then, the rules were almost completely in the DMG, so players just knew how to build characters and understand a few concepts. To learn to play pretty much required joining an existing group, and being a DM needed someone to teach you. It became an apprenticeship situation, where someone teaches you, so you look for potential players and DMs to teach them. The basic game did a much better job of teaching DMs, but it was still better to learn from another.