Please, I would like a review about this 5k game. I played a Moyo oriented game, but I was destroyed

#1

Hello,
Please, anyone can help-me with a review about this game?

I didn’t know how to protect my territory.
the opponent destroyed all my game =/

I’m white.

Thank you very much!

#2

You missed a winning move at D2. S15 was very big too.

There is no secret recipe, enclosing central territory is tough. Sometimes you can achieve it if you keep some bargaining power. But in your case, you gave black solid corners, and on the contrary it was a white group that was under attack.