Turn to a new page. Sometime the page was a blank or sometimes the page was just a new chapter.
When something in your life changes,this is great expression.
I am turning over a new leaf. I am starting a new chapter in my life.
A: Is that tea?
B: Yeah. No more coffe for me.
A: You stopped drinking beer, too! Did you turn over a new leaf?
B: Yeah! I'm trying to be more healthy.
A: 그거 차야?
B: 응. 나 더이상 커피 안마셔.
A: 너 맥주도 그만마셔야되! 새로운 삶 시작인거야?
B: 맞아! 좀더 건강해지려고 노력중이야.