Wanna some help guys please

I’m sorry but as you are using a commercial theme, you need to seek support from the theme’s vendors.
https://www.elegantthemes.com/forum/

In the meantime, try using Firefox with the Firebug add-on for this kind of CSS work. However this does assume that you have some knowledge of CSS.

https://getfirebug.com/
CSS Tutorials
Learning CSS

Thanks For Help