I need to ask myself ，what kind of life I want

bold= my corrections

I need to ask myself what kind of life I want.
我需要问问自己，到底想要怎样的生活

If I choose a high salary job, I will have no time.
如果选择较高工资的工作，就会没有时间

If the job have a free time but less income. Less stressful jobs pay less.  
有空闲的时间的工作，但是工资少

I don't know how what to choose.
我不知道该怎么选择

The life needs money, but money is not the life complete.

Money is necessary for life, but does not complete it. 
生活需要钱,钱不是生活的全部

Last year, I have had a lot of free time I can to learn the languages.
去年，我有很多空余时间可以学习语言

I can often have a talk with my language partner,
我可以经常和我的语言伙伴聊天

In addition to have no money  Even though I had no money, but I was very happy
除了没钱，但是很开心

In August last year, I had a new job, high wages for less time. 
去年八月份换了新的工作，工资相比高了些，可是时间少了

The new job is was very stressful，and I was Most of the time was unhappy most of the time. 
新工作压力很大，很多时候不开心

I want to change my life， I need to change , I must to be change. 

我要改变我的生活状态,需要改变，必须要改变

感觉像我在读一首诗。This is very good! I hope you feel less stressed out now! I edited this to be more like a poem because it sounds so poetic. :) 加油！