Best Openings to Learn as a Beginner to see succes quickly

My options are for the 700 rated players

As white,you can learn the london
As black,play the caro kann or kings indian

none.

you'll lose after the opening if that's all you learn.

right after it. two or three moves.

then they learned wrong, supposed to have some advantage or plan if studied properly

You could move your King pawn up one square with White or with Black against anything. Then aim for the same triangular pawn structure. For instance, with White pawns on e3, d4 and c3 ... with Black pawns on e6, d5 and c6.

ref:

Depends on the time control. If you are playing bullet chess, and the only thing you care about is about is early success, then oooh yeah, play the Bowdler Attack or the London System.

@nikhithshyam said in #11:

kings indian

This never ceases to amaze me. Why do people keep advising beginners to play an opening which has dozens of fundamentally different variations, doesn't fight for the center in a direct and straightforward manner and has extremely convoluted development most of the time, only to get an attack most of them would fail to convert even if they could make it happen?

The very best opening that a beginner needs to learn is the one they just played. They must analyse the game after and the play that opening again after they reviewed their game. It's the same process as getting a rewrite on an exam. .

Do you think a cheater analysis there game? I think not. I think beginners and players that want to improve analyse their games.

@nikhithshyam said in #11:

My options are for the 700 rated players
As white,you can learn the london
As black,play the caro kann or kings indian
@totallyrandomuser said in #17:
... This never ceases to amaze me. Why do people keep advising beginners to play an opening [(the King's Indian)] which has dozens of fundamentally different variations, doesn't fight for the center in a direct and straightforward manner and has extremely convoluted development most of the time, only to get an attack most of them would fail to convert even if they could make it happen?
From time to time, the suggestion has appeared in respectable sources. There was a chapter about it in Winning Chess Openings, about 3 decades ago. The late GM Evans made the suggestion in a book, about 2 decades before that. I think that the idea is to get beginners to start playing SOMETHING without obsessing too much about the opening (while primarily facing opponents who won't know so much about "dozens of fundamentally different variations"). I think that the unspoken assumption was that a beginner would probably move on to something else while moving past the beginner phase. I am inclined to think that such an assumption should be spoken.
Also, whenever I myself see this suggestion, I am tempted to bring up the "doesn't fight for the center in a direct and straightforward manner" issue:
"... The most important thing to appreciate [about the King's Indian Defence] is that Black allows White to take the centre and to build up a space advantage. This is a dangerous game to play against strong opposition as you run the risk of being squeezed. Good timing will be essential to hit back, puncture holes in the white centre, and break up the opening edge. ..." - IM Andrew Martin (2019)
https://www.amazon.com/First-Steps-Indian-Defence-Everyman/dp/1781944288?asin=B07XGLM8BT&revisidceeaa40&format=1&depth=1

@kindaspongey said in #19:

From time to time, the suggestion has appeared in respectable sources. There was a chapter about it in Winning Chess Openings, about 3 decades ago. The late GM Evans made the suggestion in a book, about 2 decades before that. I think that the idea is to get beginners to start playing SOMETHING without obsessing too much about the opening (while primarily facing opponents who won't know so much about "dozens of fundamentally different variations").

Yeah, I think this is the general point. If you teach your beginner to aim for a setup of Nf6, g6, Bg7, d6, 0-0 then maybe Nc6 or Nbd7 or Bd7 then you'll have got them to develop three minor pieces and castle in the first six moves, probably without hanging a piece or creating a major weakness, and at a beginner level that's a fairly successful opening. Then with some slight variation in move order they can follow the same development scheme against basically anything that white does - e4, d4 with c4, d4 London, c4...

I'm not convinced that it's the best option, but on that basis it doesn't seem terrible. And yeah, at that level I don't think the concept of a "very theoretical" opening matters that much.