I feel your pain. I also move very quickly on my keyboard while using keyboard shortcuts in Graphical Editing software. So fast, in fact, that it cannot always keep up and I have to stop a moment and correct it. It is... Very... Annoying...
The GIMP Devs have promised that the issues are fixed in 2.99... But 2.99 is still in development...
Anyway...
Reasonably. But be bold. The more you succeed while fearful, the better it facilitates confidence and learning.
No... I would recommend following the very guide you posted carefully. Be bold, but careful.
I am sure you will make it through just fine.
I was too bold and this resulted in doing very sensitive operations
For example yesterday, I broke the system by extending the partition via GParted, resulting in a fresh-installation of Zorin and I lost the whole one day!
Now using Timeshift and also being very careful doing sensitive operations
Yes, when I first started using Linux, I was quite bold. And reinstalled Zorin OS... a Lot. To the point I became nearly an expert on a weekly reinstall.
As time went by, the reinstalls began to happen less frequently. Now, I cannot remember that last time I had to reinstall. I have not needed to at all since I bought a new computer maybe a couple years ago.