That Caps lock thing is a bug. It is not supposed to happen. Something is wrong in your system
That firefox not restoring session is also a bug, it does not happen in most cases
You could add the following
Pinch to zoom in laptop touchpad is not a thing
Some programs will not play nicely with themes, like title bar and menu bar following dark mode, most apps not following dark mode followed by the bottom most part of UI in dark mode. Its honestly frustrating
Not wanting to break your system is quiet a common wish of most people. Good news is, you are on OpenSUSE and that thing is supposed to be stable. Bad news is, you are new to linux and will inevitably break things. Here are few tips from my side to help you not break things
1: When you are asked to modify system file by deleting some other file, do not delete the old file, rather, rename it to something else, change its extension or move it outside
2: Try to find fix that is least complicated, often times you will have many solutions with different pros and cons. If you can help yourself, try the change that is easiest to revert
3: Always take notes, if you had a problem and you did some things, note what you did and why/how you did it. What was in your mind when you did it.
4: Understand why a setting is the way it is before changing. I see alot of guides that teach you to make your system fast or make it lightweight, etc by changing some default settings. Before changing them, ask why they were the way they were. Somone at OpenSUSE probably decided to set it that way for a reason. Try to understand why and what are the consequences of changing them. Now, I am not saying you should not change it. Often times, distro maintainers try to be as generalist as possible to support as many hardware as possible like installing all kinds of drivers. You may get away removing support for things you dont actually need.
That Caps lock thing is a bug. It is not supposed to happen. Something is wrong in your system
That firefox not restoring session is also a bug, it does not happen in most cases
You could add the following
Pinch to zoom in laptop touchpad is not a thing
Some programs will not play nicely with themes, like title bar and menu bar following dark mode, most apps not following dark mode followed by the bottom most part of UI in dark mode. Its honestly frustrating
Not wanting to break your system is quiet a common wish of most people. Good news is, you are on OpenSUSE and that thing is supposed to be stable. Bad news is, you are new to linux and will inevitably break things. Here are few tips from my side to help you not break things
1: When you are asked to modify system file by deleting some other file, do not delete the old file, rather, rename it to something else, change its extension or move it outside
2: Try to find fix that is least complicated, often times you will have many solutions with different pros and cons. If you can help yourself, try the change that is easiest to revert
3: Always take notes, if you had a problem and you did some things, note what you did and why/how you did it. What was in your mind when you did it.
4: Understand why a setting is the way it is before changing. I see alot of guides that teach you to make your system fast or make it lightweight, etc by changing some default settings. Before changing them, ask why they were the way they were. Somone at OpenSUSE probably decided to set it that way for a reason. Try to understand why and what are the consequences of changing them. Now, I am not saying you should not change it. Often times, distro maintainers try to be as generalist as possible to support as many hardware as possible like installing all kinds of drivers. You may get away removing support for things you dont actually need.