I used a lot of the keys and functions when I worked as my job involved using a lot of symbols as well. I created my own shortcuts for heaps of functions because I couldnt stand wasting time using drop down menus. I don't use as many on my home computer or tablet now I'm retired.
I use most of them but some function keys have other key strokes you can use so I might be more used to them. I started back in the DOS days so when Windows came along I was already used to doing things in a different way.
As I am only new to the computer I'd have to say no. I'm too scared to touch them. The last time I touched a button accidentally my screen shrunk so small I not only needed glasses but a magnifier just to read what was written.