How can I run the interactive notebook

[FantasyVR]

I've install Julia and jupyter notebook. After that what should I do?
I don't understand

install the package and open the tutorials like:

Is it a pakcage manager or something else? How can I install that package?
Where should I type in the command

using Pkg
pkg"add https://github.com/JuliaDiffEq/DiffEqTutorials.jl"
using DiffEqTutorials
DiffEqTutorials.open_notebooks()

[KZiemian]

Contact me at kziemianfvt@gmail.com and I will help you as much as I can. There is no reason to talking about this in GitHub issue, here we should discusse on other topics.

[SebastianM-C]

Where should I type in the command

In the julia REPL.