I use Citavi for knowledge management and reference management but I can't use it with mac so how can I use Notion for these purposes
I am not familiar with Citavi and its feature so I will answer with Wikis in mind. When I am learning a new skill, I will start with a wiki template (https://notionpages.com/category/wiki/) and then build from there. I will add reference material - videos, URLs on a page, and info related to the skill on another page and sub-pages.
Hope that helps!