All you emacs cultists, share with me your wisdom. As someone who wants to learn how to use it I have a few questions.

what resources should I use to learn more about it and configuring it?

What's the difference between emacs, doom emacs and all the others I've heard about?

Are you able to and do you use the GUI or the CLI versions of it?

And are there any packages equivalent to VSCode's Intellisense?

please for the love of God don't turn this into a holy war of vim vs emacs I don't mind either I just want to try out emacs cause I think it looks awesome and something I'd be interested in.