Can u teach me how to code css?

Answer 1

Here you go!
https://www.sololearn.com/Course/CSS/?ref=app

Answer 2

Please do CSS tutorial here and use Google Search to find additional information.

Answer 3

1. There is a CSS course here in SoloLearn
2. The course is not full tho, so the best thing you can do is search a tutorial on YouTube or something like that