can’t use the right selectors

Hi
i tried for some hours to get the plugin work correctly but i didn’t :/

i think i can’t select the right selectors from my theme as it custom and old … so please can any one help me extract the right codes ?

i want to active the plugin only in category pages
site: https://www.akhbarelyaom.com/
category: https://www.akhbarelyaom.com/cat/egypt_news

waiting your kind reply ??