I actually found that option (damn plasma has everything lol) and selecting it killed the capslock completely. However, doing whatever the person did in the link without the option selected fixed the issue.
It's not hatred, but I grew up in a 3rd world country where computer teaching didn't exist until I got to college, and even then, it was one 30 minutes class a week. I didn't even know many shortcuts and key combinations until I got to the US back in 2010. I'd never known that a shift key would do such things. All I knew was capslock is to make letters caps. I guess my brain was wired differently in this regard. I'm 42 now and I'm still catching up on a lot of things I've missed out on in my young days. I've just now gotten a job as a programmer literally 2 weeks ago (the irony of not knowing how to use the shift key, right?) I'm still learning about computers. I started using Linux back in 2018 and I'm still learning about it. Thanks to Linux, my learning process has been sped up a lot. Thanks for coming to my Ted talk, and I hope that that answers your question. Lol
Pop os has an app store called "pop shop", that has both apt and flatpaks. Get all of your apps from there. They also have an app installed called "eddy" that you can use to install .deb packages in case an app is not available in their app store and you had to download the .deb package for it. Also, I know pop os has an outdated desktop, but they've been working tirelessly on their rust based cosmic desktop and it's coming along pretty nicely (an alpha release is coming soon). They do maintain their current distro no problem. I honestly would stick with it and set it up to your liking. It's a very good distro. As for your OneDrive, that can work with Linux no problem. You can also use Google drive on Linux.