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@hellomiakoda

I recommend this:
https://training.linuxfoundation.org/training/introduction-to-linux/

Cost: Free of charge.

"What You’ll Learn:
This course explores the various tools and techniques commonly used by Linux system administrators and end users to achieve their day-to-day work in a Linux environment. You will gain a good working knowledge of Linux and learn how to navigate through major Linux distributions, system configurations and graphical interface of Linux, basic command line operations, common applications of Linux, and more."