Xah Lee, infamous troll of comp.lang.lisp has a great emacs page http://ergoemacs.org/emacs/emacs.html http://ergoemacs.org/emacs/emacs.html or the mini-manual

Xah Lee, infamous troll of comp.lang.lisp has a great emacs page http://ergoemacs.org/emacs/emacs.html http://ergoemacs.org/emacs/emacs.html or the mini-manual http://tuhdo.github.io/emacs-tutor.html http://tuhdo.github.io/emacs-tutor.html I avoided starting w/Spacemacs or Prelude defaults but you may want them https://github.com/bbatsov/prelude https://github.com/bbatsov/prelude Emacs you'll find most productive if you live in it, so aside from development where you get your SQLI shell or whatever, also using magit, using pdf-tools to read papers, reading project mailing lists, using org-mode for billing if you're a freelancer, scripting your shell (and now your packages too https://alezost.github.io/guix.el/ https://alezost.github.io/guix.el/ ) ect.