I sent my first email in summer 1984, on a backwater part of CSNET in Oklahoma...
My first P2P went from Casper WY to SLC UT over AT&T [then known as Mountain Bell] normal phone lines. Both nodes were DEC PDP1011 (about the size of a small fridge).
Around 1983, I got a Commodore 64 computer with a 1541 floppy drive (I had the tape drive at first, but upgraded peripherals). I started a BBS (bulletin board system) shortly there after, and dialed into many others, trading warez, and kicking off leeches who just logged on to download new gamez.
Good times.