Odoo launched new hashtag#eLearning and training courses for everyone to learn how to use odoo to run their business for FREE. Odoo functional training for ashtagFinance, ashtagCRM hashtagHuman Resources , Manufacturing, hashtag eMarketing and more.
The new thing here in addition to excellent training material, is that Odoo is introducing Odoo Slides module as an eLearning platform or simple learning management system LMS. The new Slides module is a powerful tool for companies to manage corporate training online for their employees with the need to go outside the system. 

Odoo used Thinkfic platform to provide paid online training. 

This is of course for odoo functional training. But if you want to learn Odoo technical, then you better start with odoo documentation on the official website.