@1
"I simply blunder pieces a lot."
++ Blunder check before you move.
After you have calculated, do not play your intended move.
Imagine it played on the board, and check it does not blunder any piece or pawn,
or run into checkmate. Only then play it. Sit on your hands.
How do I practice calculation?
I am aware of the fact that I need to do more tactics training and calculate more in games. I simply blunder pieces a lot. But how should I actually go about it? Is there a specific way to train this skill? I find it extremely difficult to imagine positions a few moves out.