I'm trying out popOS and even the native package manager (popOS shop?) installs most applications as flatpaks afaik? I have no idea where they end up being compared to windows' program files or what kind of defaults they install with. I started putting my custom downloaded AppImages into the ~/Applications folder and then used AppImageLauncher to actually have them show up in search.
Then I will run into something like docker which is not in the shop and has a ton of commands you have to run in order to get it to work, like uninstalling conflicting packages, installing some certificates and keyrings and i dont even know what - it was supposed to work better than on windows but it is nowhere near as neat as there!
Then I install samba (again, not available in the popOS shop) and I have it running but i have no idea whether it's set to automatically run or not. Searching for it with GUI tools doesn't show it as installed anywhere so in this case i have to rely on the terminal. The popOS store does have a list of installed apps but the search field gets disabled when you go into this screen because it's only used for browsing the shop, not through your installed apps?
I’d say that the best learning resource you can have is a spare computer specifically dedicated to exploring Linux, with which you can install and break and configure and break again without worry. Learning Linux can be like playing a roguelite, and I mean that also in the sense that it can be fun.
This is what I do but the issue is that I have no feedback on whether Im doing the right thing or if im making the life unnecessarily difficult for me. Games will slap you and make you redo something if you fuck it up, linux just makes you live in agony until sometimes breaks and you dont know why.
Haha no worries, that's also a common linux experience :P