What should I learn at 360 to get to 500 ?

When they say 'Don't blunder pieces' I interpret it as, think before you move.

Absolutely make sure that you aren't hanging any pieces when you play your next move. Like you said, just focus, and you'll blunder less. 

Yeah. With the idea that the goal with a material lead isn't so much some brilliant tactical checkmate as much as to have a king + queen or rook against the opponent king.

And that all that takes is a pawn that can promote.. Too many people even into  my level (1200 rapid) lose sight of this. They get up material and start looking for some mate instead of just using that lead to ruthlessly simplify.  

At the very lowest level it also means not to worry about being aggressive or attacking until after your opponent blunders away a piece or two.  It is a boring way to play but learning the basics of anything is not thrilling. 

For example a 2500 rated player has huge skill in not blundering, and might blunder only 1 out of billion moves on average, without even paying attention. But a 100 rated players might blunders every 1 out of 2 moves on average. So paying attention can help you get from 1 out of 2 moves to 1 out of 4 moves, but not 1 out of billion moves. But the good thing with focusing on it is by focusing you improve your skill, so you get from 1 out of 4 moves to 1 out of 5 moves and so on gradually day by day it improves. 

Aside from all the other suggestions, which have merit, play some daily games. This will give you time to really think and analyze.

Keep rehearsing the basics. Develop your pieces. Look for threats. Look at what your opponents moves do and which spaces they leave behind. Look for weaknesses they create.

Most of all at that rating it will come down to how often you blunder pieces and see the ones the enemy blunders.

You can use this! We can also have a 10 min game ifu want, since I'm also in the 300 - 500 range

I suggest this as well.

lol

FWIW, through about move 18 you were both playing really well for your rating. You clearly have the thought processes to be much higher rated. But consistancy is lacking. You stopped paying attention. At my rating of 1300, I have the exact same issue and it prevents me from getting better. As others have said, play slower, longer games and train to maintain the attention.

It's simple to raise your level get good

Hi

Hi! My name is Lauren Goodkind and I’m a chess coach based and chess book author based in California. 

I have tips to help you improve your chess skills so you can win more games.  

I recommend playing with a slow time control, such as game in 30 minutes.  You need time to think.  Beginners tend to make a lot of silly moves with very little time.  This makes sense since there’s a lot of pieces on the board.  
 

I also offer a  free beginner’s free eBook on my website, www.ChessByLauren.com in case you are interested. The book is about asking questions before each move.  
   Before each move, I highly encourage you ask questions before every move such as, “If I move here, is it safe?”, “Can I safely capture a piece?”, and more.  

Also consider all checks and captures on your side and also your opponent’s side. 

Learn basic tactics such as the fork, discovered attack, pin, and more.  I offer interactive puzzles on my website: https://www.chessbylauren.com/two-choice-puzzles.php  
If you are serious about chess, I highly recommend you hiring a chess coach to help you.  
I hope that this helps.  

Adding on to this, also think about every move your OPPONENT does that seems threatening (and if your playing in a longer time-mode, possibly EVERY move he/she does). "What does that move do? Does that attack anything? Is he threatening checkmate/a fork/a pin/ a skewer etc."

I wish you luck on your chess journey. Someday you'll be at my level hahaha

To repeat some others' comments: play some slower games.

The bottom line is this: the main difficulty with players in the 500 and below level are too many blunders.  Focus on that first -- by trying to play slower games.  When you can get through slower games with minimal blunders, then you can try going back to 15 minute games, or whatever.  In your latest game, you left a queen hanging by putting it on the same file as your opponents' rook.  We can guarantee: if you stop doing that, just that one thing, your rating will start to go up.

This is a small sample but I was looking for similar advice. I had played a bit was up to about 600-800 depending on the day. I decided to “get serious” books on openings, middle, end game, tactics etc and immediately lost a dozen games. Oddly vs the computer was I ok but with an opponent, lost, and lost and lost. I wish I knew where I saw this advice (to thank them) though it is similar to a lot here and it’s lay off blitz and bullet, play long games, keep your pieces safe, always look at what can hurt you etc.

I basically stopped worrying about what my opponent is doing. ( I will down the road) I made sure my pieces were safe, always looked and tried to stay out of harms way etc. now it is not a big sample but have gone 5 out 6. Also puzzles (even though I am marginal at best) help. Every once in a while I see something and think...”wait I’ve seen this before”.. Rather than now getting discouraged I’m playing much better at my current level which in turn will raise my rating. I’m an older player getting back into it after nearly 40 years away, but the beginning is a good place to start...

The only thing I would add to this is to look at opening principles, not openings.  I strongly recommend investing (a mere) eight minutes of your time to look at this youtube:

Chess Basics: Opening Principles

As far as not worrying about what your opponent does (except for making sure you know what pieces he is attacking), I think that's fine at your level.  I think the first three steps for a newbie (I'm not saying you're a newbie, but speaking generally) are:

1.  Learn opening principles

2.  See how much you can eliminate hanging your pieces

3.  Recognize when an opponent has hung a piece

When you find yourself getting that, move on to learning tactics and doing the puzzles here.

If you're really up for it, I strongly recommend Emms' Discovering Chess Openings.  Outstanding book.

 

I sometimes play the computer and if there was a blunder I would go back, re-think about it and then find a better solution to it

I had been just about to post recommending Emms’ book on opening principles but Sholomsimon beat me to it! Great book!