Help a beginner (600 elo)

Hello, is anybody willing to analyze my games and or teach me how to analyze my own games?

What should I do when I analyze my games, and how do I apply what I learn in my next game? 

I have this game that I played about 20-30 minutes ago.

 Thanks!

As for the move where I put the bishop on d3, should I have just done Nc3,  take the d5 pawn, or put another pawn on d3 defending the e4 pawn? I put my bishop there because I wanted to defend it without bringing out the other knight.

Thanks again

The basics of each phase of the game

Opening:

Follow the Opening principles:

1. Control the center squares – d4-e4-d5-e5

2. Develop your minor pieces toward the center – piece activity is the key

• Complete your development before moving a piece twice or starting an attack.

• Move pieces not pawns.

3. Castle

4. Connect your rooks

• By move 12, you should have connected your Rooks, or be about to do so.

Middle game:

When you have completed the Opening Principles, you are now at the middle game. Now you need to formulate a middle game plan. The middle game is a very complicated part of a chess game. A simple way to develop a middle game plan is to perform the following steps.

1. Scan your opponents 5^th, and 6^th ranks (3^rd, and 4^th if your black)

2. Look for weak pawns, and or weak squares.

• Weak pawns and squares are Pawns, and squares that cannot be defended by another Pawn.

• Knights are excellent pieces on weak squares.

• When deciding on weak squares, and weak Pawns to attack, the closer to the center the better

End game:

Start with the basics:

1. Learn basic mates – KQ vs. K, KR vs. K, KRR vs. K

2. Learn Opposition, and Key Squares

3. Learn basic King and Pawn endings

Pre Move Checklist:

1. Make sure all your pieces are safe.

2. Look for forcing move: Checks, captures, threats. You want to look at ALL forcing moves (even the bad ones) this will force you look at, and see the entire board.

3. If there are no forcing moves, you then want to remove any of your opponent’s pieces from your side of the board.

4. If your opponent doesn’t have any of his pieces on your side of the board, then you want to improve the position of your least active piece. 

Capturing the pawn is the most usual move.

Nc3 is also a move though, it's fine.

d3 allows black to trade queens and you can't castle anymore

Bd3 is a move you sometimes see beginners play. It's not good because it's blocking your center pawn.

You could also consider advancing the pawn, although for reasons I won go into it's not very challenging for black. Best is to capture, and when black recaptures the queen comes out early, which makes it vulnerable.

And while that may be fun to know, more useful is GodsPawn's advice above. There are usually many possibilities in the opening. Playing principled moves lets you find decent moves in all sorts of openings even if you've never seen them before.