For me, my Dad brought home a laptop from work and we looked up pictures of pokemon and went to the Simpsons website, circa around 1999. How about you?
My first memories were just getting the damn thing working. We had to add RAM to our Packard Bell 486 and buy a modem. Getting email working on it was a chore but that was for my parents so I did not care until Hotmail came out a few months later when I could get my own. Then I essentially signed up for spam. I read a lot of PC World and looked through Yahoo’s categorized websites which were a lot of Geocity sites. I’d use WebCrawler to search for SimCity 2000 sites and since I was 12, boobs. That last one was risky because closing Netscape Navigator took a good minute to close out so there was no quick switching to something else if someone walked in. I would also hit up chat rooms and forums, generally PC or N64 related ones. Many of those probably should have had a lot more moderation than they did. I think I remember Tom’s Hardware’s chatroom/forum exposing me to things that a 12 year old and even adults should probably not be exposed to.
Overall, there was a lot less moderation and a lot less centralization. You had to seek out what you were looking for because there was not a ton of tracking and your interests would not be constantly bombarding you and reinforcing your views.