Pre eJPT recommended study?

JSN

So I currently have the package for the ptsv3 course, and I'm wondering if there is something I should study or become familiar with beforehand.

My goal is Network+, Linux+, eJPT and then OSCP.

JoJoCal19

Not really, unless you're completely new to IT in general. PTSv3 covers networking and other skills you need to know pre-pentesting knowledge.