Go for broke: risk everything in one determined effort to do sth 孤注一擲

I decided to go for broke and start my own business. 我決定孤注一擲創辦自己的公司.

a change of heart: 改變態度,改變看法(尤指變得更加親切,更友好等) a change in your attitude and feelings, especially becoming kinder, more friendly,etc.

the government has had a change of heart over the proposed tax reforms and is now prepared to listen to public opioion. 政府對稅務改革的提議改變了態度,現在準備聽取公眾意見.

Change your ways: start to live or behave in a different way from before 改變生活方式,換個活法

I've learned my lesson and I'm going to try to change my ways. 我學乖了,要換個活法.

It's unlikely your boss will change his ways. 你的老板不可能改變做法.