This is very simple , first start your localhost xampp server start Apache and MySQL. now open your WordPress wp-admin page open and follow me.
If you login to the WordPress WP-Admin page, you will see this page.
If you login to the WordPress WP-Admin page, you will see this page
Now move the cursor point over the posts in the sidebar then a drop-down menu will open then click on Categories.
Now you are viewing this page. Now you add name, slogan and description. Now you have filled in all the details and click on the Add New Category button.
now are see hindi sad song category add right side.
How to add new categories
check out my blog.