I just reviewed your profile and I looked at some of your chess games, its my suggestion that you should create your opening repertoire.
before going to my suggestions, let’s watch one of your recent chess game.
Above Game’s Review
In above game, you made many mistakes, and it starts from move 2, when black played e6 move, you should have played c4 move, controlling more central squares.
And then you neglected the basic chess opening rule, which is to develop your pieces and you were trying to capture your opponent’s queen although his queen had many escaping squares.
Opening Suggestions
In many other chess games, you are playing with basic knowledge of chess opening, which is not enough, if you want to get 1500 rating then you must learn chess openings with theory.
Its my suggestion that you should create or get opening repertoire and play with it, until you reach 2000 rating.
There are many free sources available for free opening repertoire, you can get from YouTube or search on google.com.
Middlegame Suggestions
In the middlegame, you were blundering your pieces, now next question will be how to stop blunders in chess?
This happens lot in beginner games, and the solution is to just ask one question when its your turn.
Do I have any unprotected piece or pawn? if you seen any hanging piece, or unprotected piece then first you have to find the way to protect it.
If you just follow above rule then you will never blunder your piece or pawn.
Endgame Suggestions
In endgame, you should learn basic pawn ending and basic rook ending. If you learn these two ending you will increase 100 elo for sure.
Go to YouTube and search king and pawn endgame and then rook endgame.
Conclusion:
Now I have given you two suggestions and topics to learn, one is create your opening repertoire, and second is to protect your piece and pawn in order to avoid blunders.
If you still have any questions, you are free to ask at: ChessJunction.com
Thanks for suggestions, I will try stop blunder technique.