A lot of people equate ‘the internet’ with the web, which would be 1989.
Others will point to when they got their first email address, some years before that.
Really though, you should be looking at the beginning of ARPANET, which goes back to 1969.
shalafi@lemmy.world 5 days ago
I peg the start around 1994. By then it was a household term, computers and dial up were fast becoming ubiquitous, people were learning to navigate the web, etc.