Good 800 elo openings

I was 800 a month ago and now 1041 so I can tell you what worked for me 1. With white - London system is unbeatable at this level 2. With black (king's pawn) - Mostly opponents play king's pawn don't push the same pawn I used to do that and used to get hit by gambits which turned into bad positions Instead play caro kann defense very very solid. 3. With black (queen's pawn) - You can still go for London system with black (I did it many times from 800 to 1041). I am recently learning Leningrad Dutch for Black's queen's pawn. It will hardly take 2-3 hours to learn this and apply all of this in games I recommend watching GothamChess videos of the same. An advice - don't look for traps to win fast play properly all pieces out first then middlegame then endgame no hurries to win And also take your time, blunder less
You can watch my games what worked for me I am sure you would also reach 1000 pretty soon with caro kann and London :-)

I will keep it short: openings doesn't really matter at this point of level. Blunders is the part you need to focus on.

If you were referring to 1500 FIDE, then you are right. In chess.com, 2000 might start want to study the openings. This is my personal experience, I might be wrong.
You are right that openings don't matter but if we know first 4-5 moves it is always good because it leads to a comfortable middlegame isn't it?

You are right that openings don't matter but if we know first 4-5 moves it is always good because it leads to a comfortable middlegame isn't it?
That's where @newlyomanmenar advice come. If you were just following the opening principles, you wouldn't need to study openings. Your first moves would also be good.
Please please does anyone know good openings for 800 elo that take only like 30 mins to learn
also does anyone know what elo is beginner and what is intermediate