How to play the opening correctly

You've played over 600 games across the formats on this website and never once beaten a single opponent rated over 1500 in any of them.

Just develop your pieces and castle. If you're doing that then openings are not one of your bigger problems.

Again...openings arent your problem.  You losing games for the same reason all beginners lose games.  

1. Youre not following opening principles.

2. Youre missing simple tactics.

3. Youre hanging pieces.  

Openings have nothing to do with you losing games.  

What you need to work on:

Opening Principles.

Tactics...tactics...tactics...

Also...studying openings will not help you with tactics, and not dropping pieces.

"... A remark like 'games are rarely decided in the opening' does not really do justice to the issue. ... even if an initial opening advantage gets spoiled by subsequent mistakes, this doesn't render it meaningless. In the long run, having the advantage out of the opening will bring you better results. Maybe this warning against the study of openings especially focuses on 'merely learning moves'. But almost all opening books and DVD's give ample attention to general plans and developing schemes, typical tactics, whole games, and so on. ..." - IM Willy Hendriks (2012)

Two quotes from Winning Chess Openings by GM Yasser Seirawan:

"I hope I've provided you with food for thought and that you now have a better understanding of the reasons behind most chess openings."

"I hope that this book will stimulate you into buying further books that are more specific about the openings and defenses that you might enjoy."

For someone seeking help with openings, I usually bring up Openings for Amateurs by Pete Tamburro (2014).
http://kenilworthian.blogspot.com/2014/05/review-of-pete-tamburros-openings-for.html
I believe that it is possible to see a fair portion of the beginning of Tamburro's book by going to the Mongoose Press site.
https://www.mongoosepress.com/excerpts/OpeningsForAmateurs%20sample.pdf
Perhaps Cubronzo would also want to look at Discovering Chess Openings by GM John Emms (2006).
https://web.archive.org/web/20140627114655/http://www.chesscafe.com/text/hansen91.pdf
"Each player should choose an opening that attracts him. Some players are looking for a gambit as White, others for Black gambits. Many players that are starting out (or have bad memories) want to avoid mainstream systems, others want dynamic openings, and others want calm positional pathways. It’s all about personal taste and personal need.
For example, if you feel you’re poor at tactics you can choose a quiet positional opening (trying to hide from your weakness and just play chess), or seek more dynamic openings that engender lots of tactics and sacrifices (this might lead to more losses but, over time, will improve your tactical skills and make you stronger)." - IM Jeremy Silman (January 28, 2016)
https://www.chess.com/article/view/picking-the-correct-opening-repertoire
http://chess-teacher.com/best-chess-openings/
https://www.chess.com/blog/TigerLilov/build-your-opening-repertoire
https://www.chess.com/blog/CraiggoryC/how-to-build-an-opening-repertoire
https://www.chess.com/article/view/learning-an-opening-to-memorize-or-understand
https://www.chess.com/article/view/the-perfect-opening-for-the-lazy-student
https://www.newinchess.com/Shop/Images/Pdfs/9035.pdf
https://web.archive.org/web/20140627110453/http://www.chesscafe.com/text/hansen169.pdf
https://www.newinchess.com/Shop/Images/Pdfs/9029.pdf
https://www.newinchess.com/Shop/Images/Pdfs/7277.pdf

In a 2006 GM John Nunn book, in connection with opening study, it is stated that, if a "book contains illustrative games, it is worth playing these over first", and the reader was also advised, "To begin with, only study the main lines - that will cope with 90% of your games, and you can easily fill in the unusual lines later."
"... I feel that the main reasons to buy an opening book are to give a good overview of the opening, and to explain general plans and ideas. ..." - GM John Nunn (2006)
In one of his books about an opening, GM Nigel Davies wrote (2005), "The way I suggest you study this book is to play through the main games once, relatively quickly, and then start playing the variation in actual games. Playing an opening in real games is of vital importance - without this kind of live practice it is impossible to get a 'feel' for the kind of game it leads to. There is time enough later for involvement with the details, after playing your games it is good to look up the line."

Yes. Get some good BOOKS and study it.

Better still, learn to play better chess in general.  Then you'll be able to find stronger moves in the opening.

There are no "cheap" tricks or secrets to success at chess, unless you are satisfied with mediocrity and your ambitions go no further than beating other relative beginners.

Did Cubronzo ask about "'cheap' tricks or secrets"?