我写的一篇英语文章梗概,请英语好的人帮我看看有没什么语法错误以及还有什么地方可以改进的,谢谢!

我写的一篇英语文章梗概,请英语好的人帮我看看有没什么语法错误以及还有什么地方可以改进的,谢谢!
There is a person who came to be known when he was only 25 years old by one published book of his.His name is Zhang Yuncheng.
Different from other young authors ,he succeeds with a particularly unusual story behind .
It was found that there was something wrong with Zhang`s muscles when he was just three years old.Worse still,his situation became worse and worse ,which finally made him not to receive education in the school .He hadn`t gone to school for more than one day before bad health forced him to quit it forever .From then on ,his whole world became his family and it was only out of the window near his bed that could he have a look at the outside world .
However, he never gives up .At the age of 12, he became interested in learning to read and stuck to teaching himself to write .His letter to a newspaper, and the door of success was gradually open to him from then on .
Zhang Danuo read his letter.Touched by his sincere words ,Zhang decided to help him .Zhang Danuo arranged a writing task for Yuncheng almost every week .Even though often tormented by the disease ,he spared no effort to write essays ,which have described his life 、 hopes、dreams and so on , and had a great influence on many a reader .
Zhang Yucheng finally made it with his book selling extremely well.
Through his personal experience, Zhang Yuncheng has shown us a truth ,which is that while there is life there is hope .
尤其是这几句我不确定：by one published book of himself：通过他发行的一本书
he succeeds with a particularly unusual story behind ：这里的behind后面需不需要加个him
He hadn`t gone to school for more than one day before bad health forced him to quit it forever :他还没有上过超过一天的学（只上过一天的学）就被迫因为身体问题永远地离开了学校.

第一句问题就蛮大的
再问： 为啥？？
再答： There is a person who was known through a published book he wrote in his age of 25,这样就行了。。其他就更不要说了。。
再问： 恩恩好，谢谢，那其他的你也看看，哪里还要改
再答： 不知道从哪里开始改啊。。。。
再问： he succeeds with a particularly unusual story behind ：这里的behind后面需不需要加个him He hadn`t gone to school for more than one day before bad health forced him to quit it forever :他还没有上过超过一天的学（只上过一天的学）就被迫因为身体问题永远地离开了学校。 那只要改下这两句就好了，第二句我希望用到before 谢谢
再答： 第二句：he was forced to leave school before he studyed more than a day because of his physical problems.第一句不知道你想表达什么？