Can I create a separate admin section for my plugin?

So, As we discussed in comments, the better approach is to do something on Frontend. It adds unnecessary wait to the page, and therefore it isnt viable to have it on backend. If you are building plugin for your own use, then the approach of having backend filters removed on that page could be useful, … Read more

How To Create WordPress Dashboard Item

What you need to do in your case – is to create a custom post type. Please read about post types in WordPress here https://wordpress.org/support/article/post-types/ You can use a plugin to create Case Studies post type https://uk.wordpress.org/plugins/custom-post-type-ui/

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