This video makes how CSS works easy to understand...it's just styles added to your page. You can do a lot with them, but at the end of the day, there's very little you have to know about CSS itself to start using it.
View the whole playlist of 2018 Web Development Tutorials for Beginners: https://www.youtube.com/playlist?list=PLoYCgNOIyGABDU532eesybur5HPBVfC1G
Video 1: Professional setup with VSCode
Video 2: HTML Tutorial for Beginners