NeoVim
NeoVim is a great text editor. It can be customized to your liking. However I have used neovim with the default config for years. Here is a pretty good cheat sheet to learn most of the commands. Once you learn how to navigate neovim you can also use those commands on VSCodium via extensions. You can also use them on certain terminal emulators as well. NeoVim can be downloaded via package manager or from its github page.