Start Emacs, hit Ctrl-h and then t (C-h t in emacs lingo). Brings up the tutorial, it's a quick intro to editing. Now open an org mode file, and open the Org mode info manual: Ctrl-h and then i, then m, which'll bring up a prompt, type "org" and hit enter (C-h i m org RET). By time you'll find your way to use it. Both emacs and org-mode lend themselves to excessive customisation, and learning a bit of Elisp unlocks incredible power.

There are a myriad of packages and tens of starter kits like Spacemacs out there, it's quite possible that looking at these, one does not know where to start. I suggest you start with vanilla emacs and build up your personal and most-fitting experience. Takes some time but definitely worth it. It's like a city, you may have read ten tourist guides, but until you go out there and explore, you know nothing.

That said, this is my set of most basic "sanitisation settings" for emacs:

  (setf
   ;; Always open a new buffer if default is occupied.
   async-shell-command-buffer 'new-buffer
  
   ;; UI.
   visible-bell t
   uniquify-buffer-name-style 'forward
   save-interprogram-paste-before-kill t
   font-lock-maximum-decoration nil
   ;; Search help more extensively.
   apropos-do-all t
  
   ;; Ignore case when completing file names in minibuffer.
   read-file-name-completion-ignore-case t
   read-buffer-completion-ignore-case t
   completion-ignore-case t
   completion-styles '(initials substring partial-completion)
   find-file-suppress-same-file-warnings t
   enable-recursive-minibuffers t
   ;; Save bookmarks after each bookmark command.
   bookmark-save-flag t
  
   ;; Do not  ring the bell  when killing  in r/o buffers,  put the
   ;; kill in the kill ring but do not modify the buffer.
   kill-read-only-ok t
  
   ;; Search modes default to regexps. 
   search-default-mode t)
  
  (setq-default save-place t)