Hi,

Are you looking to understand the functionalities of each modules ? If yes, you can refer to the official odoo documentation and odoo elearning videos.

*  https://www.odoo.com/documentation/16.0/
* https://www.odoo.com/slides

If this is not you are looking for, please let us know

Thanks

Hi, 

Given below is the link to an article regarding Odoo. It explains from the basics of Odoo, modules in detail and their work flow. 

https://www.cybrosys.com/odoo/odoo-books/odoo-book-v16/

Hope it helps