I am a little concerned you start with package repository and then org mode. Emacs is at heart a simple, modeless editor. With c-[fbpns] and c-x c-[fa] you can immediately, if laboriously, do anything. Every new thing you learn incrementally speeds you up.
> c-x c-[fa] You mean c-x c-[fs], right? I'm by no mean an emacs expert although I've been using it for 6 years now, and when I read your comment I thought "Wow, c-x c-a is a functionality? How comes I have never used that?", so I tried that in emacs but it's not mapped to anything. Apart from that, I fully agree with your comment.
(defun align-all-matches (start end regexp)
"Align all matches of the given regular expression."
(interactive "r\nsAlign regexp: ")
(align-regexp start end (concat "\\(\\s-*\\)" regexp) 1 1 t))
It inserts space in each line of the region so that all matches a given regexp are vertically aligned. I find this to be my most common use for the powerful but complicated align-regexp.(If you call align-regexp interactively without a prefix argument it does something much like this function but only aligning the first ocurrence on each line, and if you call it with the prefix argument it prompts for all parameters of align-regexp.)