How to learn openings

"... A typical way of choosing an opening repertoire is to copy the openings used by a player one admires. ... However, what is good at world-championship level is not always the best choice at lower levels of play, and it is often a good idea to choose a 'model' who is nearer your own playing strength. ..." - FM Steve Giddins (2008)

"... Overall, I would advise most players to stick to a fairly limited range of openings, and not to worry about learning too much by heart. ..." - FM Steve Giddins (2008)
"... 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)
"... the average player only needs to know a limited amount about the openings he plays. Providing he understands the main aims of the opening, a few typical plans and a handful of basic variations, that is enough. ..." - FM Steve Giddins (2008)

I knew a lad he was prior to taking up chess a member of a football firm . the Zulus of Birmingham city , but his health went ,kindaspongey , he then took up chess , ive never seen a person more devoted , he followed the fischer method I listed above , and became very adept in Sicilian even getting a draw offer of a master in a simul , this after just a year of learning the basics ,

a good lad a heart of a fighter , and he doesn't go down easy , its rare to be inspired by a newbie but he inspired me and ive been playing for over 40 years

"... Fortunately or unfortunately, everyone is different, so what works for one person may likely fail with another ..." - Dan Heisman (2002)

https://web.archive.org/web/20140627084053/http://www.chesscafe.com/text/heisman19.pdf

which opening is better from white side

TINSTAABO

"There is no such thing as a 'best opening.' 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/opening-questions-and-a-dream-mate

The July 2019 issue of Chess lists the top twenty openings compiled from a list of 2611 May games where both players were rated over 2400 Elo. One can not take position on this list too seriously because it is greatly influenced by how the openings are grouped. For example, all the Retis are grouped together, while English is separated into 1...c5, 1...e5, etc. Nevertheless, for what it is worth, some of the list entries are: 173 Retis, 115 Caro-Kanns, 102 King's Indians, 97 Najdorf Sicilians, 97 declined Queen's Gambits, 92 1...e5 Englishes, 71 Slavs, 68 Berlin Ruy Lopezes, 67 Nimzo-Indians, 61 1...c5 Englishes, 54 3 Nxe5 Petroffs, 52 1...Nf6 Englishes, 49 Catalans, 48 1...e6 Englishes, 44 Giuoco Pianos, and 40 Queen's Indians.

"... A typical way of choosing an opening repertoire is to copy the openings used by a player one admires. ... However, what is good at world-championship level is not always the best choice at lower levels of play, and it is often a good idea to choose a 'model' who is nearer your own playing strength. ..." - FM Steve Giddins (2008)