Would you like to play a game to find out?
Chess Help/Discussion Forum
But to answer your question now you will definitely want to go over all of the basics before starting openings. Once you have gotten down the basics then start looking into openings and endgames. I hope this helps.
Learning openings help you kind of shape the game into the way you want it to be. Like an open or closed game.
I think that it is fairly common for a player to be advised to first learn the Queen's Gambit Declined. If nothing else, it is probably going to be easier to find recent introductory opening books like First Steps: The Queen's Gambit
https://www.newinchess.com/media/wysiwyg/product_pdf/7652.pdf
and The Queen's Gambit Declined: Move by Move.
https://www.newinchess.com/media/wysiwyg/product_pdf/7743.pdf
It might be a good idea to consider Discovering Chess Openings by GM John Emms (2006).
https://web.archive.org/web/20140627114655/http://www.chesscafe.com/text/hansen91.pdf
More advanced:
Playing 1 d4 d5
https://www.chess.com/blog/pfren/playing-1-d5-d5-a-classical-repertoire
https://www.qualitychess.co.uk/ebooks/Playing1d4d5-excerpt.pdf
Play 1.d4 d5 2.c4 e6!
http://www.chess-stars.com/resources/contents_Play%201.d4%20d5%202.c4%20e6!.pdf
Scotch? Yes you can play Bc5, but what happens after Be3?
I think that there is a chapter about this in How to Beat the Open Games.
http://www.gambitbooks.com/pdfs/How_to_Beat_the_Open_Games.pdf
If I remember correctly, I once saw 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6.
Should I learn openings? Or is it ok if I just understand the basics?