Handle item types in Zotero

Hi everyone, I have some issues with Zotero. I only interact with PDF files on Zotero (e.g. highlight or take notes). For another Item type like Blog post, Webpage or Journal Article that I saved from the internet if it doesn’t find an available PDF I can highlight or note on them. When click on them, I will be navigated to a web and can not highlight or take notes.
Is there any way that I can interact with them in Zotero, saw many YouTube clips but can not know how they can interact with these item types on Zotero side.

Can interact easily with the webpage that has pdf version.