Start making maps!

[Mr.HaritH]

Download J.A.C.K. Hammer editor from the official site: https://jack.hlfx.ru/en/download.html
Or from steam: https://store.steampowered.com/app/496450/JACK/

Setting up your JHE (JACK Hammer Editor):
At the moment "4:56" you have to add halflife-cs.fgd from your cstrike folder
Also at the moment "5:12" I suggest these settings for you: ""see here""

Start mapping part 1:
Skip to the moment 7:35 (cuz the first part is just setting up VHE)
Btw, you can watch VHE (Valve Hammer Editor) tutorials if you are using JHE (JACK Hammer Editor) since they are almost the same.

Part 2: 

 

[Mr.HaritH]

Also here is another mapping tutorials playlist by Commandeer: 
You can skip the "Getting started" video since you already downloaded JHE so you don't need to download VHE again.