Learning Elisp is definitely worth it. If you learn it, you'd be able to immediately improve your workflow in minor ways, the moment you spot any things that can be improved.

In terms of mastery - Lisp is a very easy language to learn, it's just that it's a bit alien to the current C-imperative crowds, so takes maybe 1 month until you'll be able to read it comfortably.

Learning resources are pretty great. Just go through the "An Introduction to Programming in Emacs Lisp". The fact that you're not a professional programmer is even better here, because those get too bored with it quickly. After that you can just read Elisp Reference on the need to know basis. Of course I also highly recommend you learn info too, because there's a reason why us, Emacs people, love doing everything through Emacs. Anyway, a good goal for Elisp knowledge is being able to program in it comfortably without ever needing to google anything, just relying on the Elisp Reference alone.

P.S. Don't listen to all the people(mostly from other Lisp communities) who say that Elisp is clunky and sucks. The fact stands that the Elisp community has produced Emacs and what did all those superior Lisps produce?