Where can I find the star root image

WordPress.org

Since I have no idea about CSS, I have to rely on copying.

This is a pragmatic solution, but in my opinion the wrong way to go. There are tutorials (also on Youtube) with which you can learn the basics of HTML5 and CSS3 over a weekend. This is a basic knowledge that you will need again and again.

Even experienced developers keep copying code because it is faster and they can assess what the code means with a trained eye. But even experienced developers will tell you again and again how important the basics of HTML and CSS are.

By the way, you can't talk yourself out of age with age. 😉
We have a number of older users in the WordPress community who are really extraordinary.

Addendum: Assuming a good knowledge of English, this is a good start:

  • This answer was modified 3 weeks, 2 days ago by Bego Mario Guard. Reason: addendum