I want to know if it's possible to delete a whole word or move around one word at a time when in INSERT mode, like in "regular" applications when pressing Ctrl and using the arrow keys jump one word at a time, or pressing Ctrl+DEL deletes a whole word.
Maybe plugins exist for this or plainly configuring .vimrc?
To delete the word before the cursor in insert mode, you can type Ctrl-W.
Vim has a handful of other insert mode shortcuts, and these are documented at :help ins-special-keys, and :help ins-special-special. Note that Ctrl + left/right are already mapped by default, but they don't necessarily work in all environments.
There are also a number of plugins that provide further such functionality in insert mode, e.g. rsi.vim, vim-emacs-bindings.
