Topics that can be customized by users.

Hello, I have a question about the development of wordpress themes.

Let’s suppose that I am developing a theme that shows some cards over the current page with information. I want users to be able to enter information on those cards (even add new ones, remove them, etc.).

How can I do something similar to this?
I suppose that for this it will be necessary to use some plugin that classifies posts by type or something like that. (I already tell you that I have no idea).

Thanks and best regards.

Hi, someone knows about this?