Was just thinking, when we first signed up to "Compuserve" $5 per hour dial up internet, I had to test it. I saw a box of Special K on the table and typed in www.kelloggs.com. About a minute and a half later our household had officially entered the WEB and the Frosty Flakes tiger was yelling something at me.
Before the WWW there was Archie which was the first that I knew of to be implemented as a gui that allowed search and download of files over what was then the aarnet.
So that was the first I used, back in the '80s. Would have used that to access the MIT site where there was a readme file explaining the theory of the how the www could work. Then later they advised that Netscape was available and would make life much easier.