Atom would be a good choice five years ago. But atom is now without support as Microsoft wants users to use VS-CODE. Which is a good choice other choices are Vim, Notepad++ and Sublime text.
The commands online had a lot of error messages and I forgot my bios boot key. I'm considering dual booting instead with a LIVE USB stick does anyone know how to do that on Ubuntu.
I think your problem is that you erased your disk in the Ubuntu installation, or,
Je pense que votre problème est que vous avez effacé votre disque lors de l'installation d'Ubuntu.