Go for broke: risk everything in one determined effort to do sth 孤注一掷

I decided to go for broke and start my own business. 我决定孤注一掷创办自己的公司.

a change of heart: 改变态度,改变看法(尤指变得更加亲切,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. 政府对税务改革的提议改变了态度,现在准备听取公众意见.

Change your ways: start to live or behave in a different way from before 改变生活方式,换个活法

I've learned my lesson and I'm going to try to change my ways. 我学乖了,要换个活法.

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