Sorry but how can I add, edit, delete fields or other items?

For example: in the Auto category I would like to add type fields, Engine, Cv, Cq, Marce, Exchange, Km, Year, Accessories, etc ...

If you can do it, can you show me a guide where you can study?

Thank you very much.

@w_t
Custom attributes plugin, custom fields, ...

Hoooooo!!!
It was under the eyes and I did not see it

thank you very much.