Just over a week has passed since I've started messing about with Ubuntu. So far, I've felt very little restrictions.
I also learned a few things. At the start, I had issues installing Ubuntu: It kept closing the installation window. I thought it might be my unstable internet, but it wasn't. Ended up being a quick fix that my wife looked up online: Picking safe graphics mode.
Then I looked for a way to install 
@TutanotaTuta and learned what an 'AppImage' is, and how to install it. This is when I also realised there are several 'app stores' to choose from. I also found out that you have to set specific files to be 'executable' before you can use them.
The 'most complicated' situation I could solve with help of the internet was figuring out how to install the driver for my WiFi USB stick (because my built-in adapter is either broken or simply *sucks*). 
@ostechnix led me through the lines of commands and checks to make sure it was properly installed. It felt really good when it all worked out.