It depends on the year for GenX, that's why there's Xennial (1977-83/85). My siblings and I (2 Xers and a Mil) grew up with rabbit ears, then cable, by high school, some households had internet or we used it at the library.
In the span of my high school years, I looked up info in an encyclopedia and printed my papers on Dot Matrix paper from a Word Processor to asking Jeeves, and laser printing from a computer by senior year. It was a weird moment in time because I had to fill out my college apps and FAFSA by hand but check out colleges websites for information. Many baby GenXers went through this.