Here is a good beginners opener...
What's the most important thing for a beginner to practice?
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Or with a queens gambit....
Or the easiest is...
don't listen to red river battle he's just posting nonesense
just warning you
This ain't nonsense. 
You gotta think of how the players skill is very low so they more than likely will fall for it.
I myself am a blitz 910 rating and I have learned this when playing 650 and below in tournaments that they easily fall for these traps.
jacacklin wrote:
Like the title says, what's the most important thing that a beginner should focus on to practice and get better? I'm only around that 500 elo.
Make sure your pieces are protected properly. Practice looking at the entire board, not just the small section drawing your attention.
To that end, board vision, practice tactics.
The first thing to practise is board vision.
Beginners hang pieces left and right and it is absolutely pointless to study anything before they get rid of these blunders.
The next thing to practise is calculation. Many beginners just play some move which looks good to them and don't even know that you have to calculate all the time if you want tö win games.
Calculation requires a knowledge foundation that beginners lack. It also takes opponents who play logically.
Red_River_Rattler wrote:
This ain't nonsense.
Yes, it is nonsense. All of these plans are basically "I'm going to attack one of their pieces and hope they don't notice."
Red_River_Rattler wrote:
I myself am a blitz 910 rating and I have learned this when playing 650 and below in tournaments that they easily fall for these traps.
This is probably one reason you are still 910 blitz. To get out of beginner ratings like this, you need to make reasonable moves and not give your pieces away for no reason and avoid making plays that hurt your position when facing opponents that just make reasonable moves instead of throwing away their own pieces in response.
jacacklin wrote:
Like the title says, what's the most important thing that a beginner should focus on to practice and get better? I'm only around that 500 elo.
Don't give away pieces for free. That's the #1 thing to focus on. So look at the entire board and see if anything of yours is under attack, and if so, if it's well defended. If not, correct that by protecting your pieces, whether you put up extra defense, move them out of the way, take/block the attacker, etc.
Improving Your Chess - Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond
jacacklin wrote:
Like the title says, what's the most important thing that a beginner should focus on to practice and get better? I'm only around that 500 elo.
In no particular order I'd say:
Before you move a piece, stop and look. Is there anything on the board that you can capture? Is their anything my opponent can capture when it is their turn to move. After I move the piece I want to move, is their anything my opponent can capture? If the answer to any of these questions is yes, think about if you should make/allow those capturing moves.
Learn the basic mates: K+R+R vs. K, K+Q vs. K, K+R vs. K. You'll want to get to a point where you can win these positions while barely having to think.
Learn how to reach these three goals in the opening: control the center, get your pieces active, and get your king to safety.
Like the title says, what's the most important thing that a beginner should focus on to practice and get better? I'm only around that 500 elo.