Found a better set of Gimp Tutorials that is more respectful of people's time and covers more things. It is a great tool for those who don't want to deal with Photoshop subscriptions. It is also available on Windows, so it is not just for Linux. You can learn this great tool even if you are waiting and learning to work with Linux.

"I know Windows 🤮 but the ARM CPU gaining Windows acceptance could mean a whole new world of FOSS computing while thumbing our noses at the large chip makers. Looking at you Intel... This would also mean a wider acceptance of software available to the ARM architecture.

https://www.xda-developers.com/snapdragon-x-elite-announcement/