create wp child theme

1Let's create a child theme for the TwentyTwentyOne theme:
2
31) Create a new theme directory:
4
5/wp-content/themes/mychildtheme/
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72) Create a style.css file inside the new directory 
8(/wp-content/themes/mychildtheme/style.css) and add the following code:
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10/*
11 Theme Name:   Twenty Twenty One Child Theme
12 Theme URI:    https://www.mysite.com/
13 Description:  A Twenty Twenty One child theme 
14 Author:       JustMe
15 Author URI:   https://www.mysite.com
16 Template:     twentytwentyone
17 Version:      1.0.0
18*/
19 
20@import url("../twentytwentyone/style.css");
21
223) Go to Appearance > Themes and select the newly create child theme
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244) Done!
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27References and further study
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29
30How to Create and Customize a WordPress Child Theme
31https://www.hostinger.com/tutorials/how-to-create-wordpress-child-theme
32
33Child Themes at Codex
34https://developer.wordpress.org/themes/advanced-topics/child-themes/
35
36How to Create a WordPress Child Theme (Video)
37https://www.wpbeginner.com/wp-themes/how-to-create-a-wordpress-child-theme-video/