Welcome! If you want to learn about some of the tools used to program in Julia before we dive into the language itself, check out Getting Started With JuliaAcademy.
Find Dr. Herriman on Twitter: https://twitter.com/janeherriman
Have questions as you go through the course? The best place to ask is here: https://discourse.julialang.org/c/usage/first-steps/8 please include a link back to the lecture you are referring to so folks know what materials you are referencing.