As others have said, the tutorial is the best place to start (C-h t). After that for any other thing you need to learn in emacs the info will probably have it (C-h i or M-x info). Emacs users usually spend much time configuring their “operating system” till they’re satisfied, by modifying the init.el, but you can get a popular config already made [0][1]. My biggest recommendation after understanding how emacs works, if you use/prefer vi binds, is install evil-mode [2]. It’s essentially a vi layer on top of emacs, and is very functional.

edit: If you use MacOS, Yamamoto Mitsuharu‘s emacs-mac [3] is my recommendation, as for linux the version from your distros package manager should be apt. ;)

[0] https://github.com/hlissner/doom-emacs

[1] https://github.com/syl20bnr/spacemacs

[2] https://github.com/emacs-evil/evil

[3] https://bitbucket.org/mituharu/emacs-mac