I would like to do a course for beginners

Hi useraccounts34,

I would point you in the direction of our free webinars and user manuals that you can go through at your own pace.

Webinars - https://quickbooks.intuit.com/au/learn-and-support/webinars/

User Manual - https://quickbooks.intuit.com/au/learn-and-support/user-guide/

We also have our own YouTube page with shorter length videos available. 

I hope this gives you enough information to learn more about how to better use QuickBooks Online!

Let me know if you needed something else.

Kristian.