Thank you very much. I've been working on learning languages with DuoLingo but the special characters I've ignored because I could not enter them easily. My notes with vim were correct because I could easily map keys. But I had no idea how to do it with linux in general without entering a bunch of keys that sometimes conflicted with the app.

So all I had to do was:
1. Settings
1.1. Keyboard
1.1.1. Select Layout tab
1.1.1.1. Slide off "Use system defaults"
1.1.1.2. Under "Compose key" select "right alt"
1.1.1.3. close everything under settings
2. vi ~/.XCompose (A file I did not have.)
2.1. Modify it as shown and save 
https://wiki.archlinux.org/title/Xorg/Keyboard_configuration#Configuring_compose_key
3. Reboot the system and done!

A todo might be to add special keys to do repetitive tasks...