I was using internet email and Usenet in 1985. I wasn't "tech savvy" - I coded, but I didn't know much about the internet or email. I got access through a UK BBS system called CIX (Compulink Information eXchange).
I first came across Usenet through my employment with Olivetti. They were selling AT&T Unix minis at the time, so we had a Usenet feed via AT&Ts office on the other side of the city. Two updates daily, I think.
[Edit] For home access to CIX, I was using a 1400-baud acoustic coupler, which I had "liberated" from the basement of a former employer. Bandwidth mattered in those days - you could DoS someone by sending them ten pages of text.
https://en.wikipedia.org/wiki/Acoustic_coupler
(Not one of those, but similar)
