How to Restrict Access to Pages/Posts to Logged-in Users or User Role | Content Control WordPress

Can I have the link of theme please

I am using a manga site. I want the pictures of the manga on the manga home page to be different without being a member. I want the person who is a member to see the original pictures. Can I get information about this?

Is there a way so that you don't need a plugin to restrict content?

Plugin required.

How can you create editable content for members that registered to your website so they can add text to their own sections and save it?

where is the link?