How to adapt the underscores theme to your layout?

Question

CMS

Hello
Can you advise a good guide? Previously, I didn’t have anything to do with cms
There is a layout from which you need to make a theme
I read that it’s better to use underscores for this
It would be nice if someone on Skype or by correspondence explained
Thanks

Answer 1

Valid:
https://www.youtube.com/watch?v=7akPICFR-AI