You can control the functions of your computer...

What percentage of the functions (apps) on your computer do you think you are able to utilize?
Either Windows or Macintosh is fine.

As stated in "System requirements", I am using Macintosh, so I will consider Apple products. I wonder if I've finally been able to use about 10% of it lately? I think.

Is 10% = 10% of usage experience around 16 years a small amount?

However, the basic applications installed in macOS that I use every day are Mail, Safari, iTunes, Time Machine, TextEdit, Preview, Stickies, and in iOS, Phone, Music, Camera, and Photos.
If you don't use anything other than these, you only use about 10% of the functions.
Oh, that's right, I use a rental server, so I also use commands.
This is something we would be in trouble without.
At this level, you don't need a computer! You may be saying that, but that's not true.
If you can use these functions on a daily basis and think of them as other applications for when something happens, you won't need them.

And I have never heard the operating instructions directly, nor have I learned the basic operations in a classroom. This is because Macintosh is intuitive and can be used intuitively, so if you don't understand something, you can use the help or search for most things.
So (it's difficult to differentiate between work and personal use), people often say that you should learn the basics of how to operate a computer, but I'm not sure if that's true, and what are the basics of operating a computer? I have doubts about this.
In the end, you just have to remember the blind touch yourself.
Even if you learn it, you will use it, and if you don't use it, you will forget it → Do you forget it and learn the basic operations again? →It's a hassle so I give up. Isn't this the flow?
If so, wouldn't it be better to learn or memorize only the functions you want to use?
(Other than that, if you touch it by mistake, you may find out that it was a function and end up using it frequently from now on.)

OSes are constantly evolving. If there is a need to learn all the functions, why not technical support or instructor? I think it's a waste of time to learn functions that aren't necessary.
It often happens that you finally get the hang of it, but even though you've learned it, it's not supported by the latest version, or the way you use it has changed. That's why there's nothing to be ashamed of if there are apps you don't know about or can't master. I think it's important to feel comfortable using the internet within your means.

Why am I writing this? Yesterday, when I put the "COUNTRY SISTERS" CD or DVD into "iTunes", I couldn't hear it even with the sound turned up to maximum. I can't think of a cause and assume that the CD or DVD is bad.
But actually, I updated my macOS a few days ago, and when I upgraded my iTunes, the audio in iTunes' "controls" became lower.
I have to ask the support center about this problem until I notice it! It's more of a clean install! I was thinking about how I should provide web construction and templates when I suddenly remembered that...
(Although it doesn't make much sense) I hope it helps.