请英语高手帮我看看我写的这篇英语自我介绍是否有语法、词汇等错误 有的话如何优化 Thank you so much!

请英语高手帮我看看我写的这篇英语自我介绍是否有语法、词汇等错误 有的话如何优化 Thank you so much!
I am so glad to introduce myself to you.Five years ago,I was a shy boy,I would blush when talking to girls.Until I was admitted to a university,I found that academic performance is no longer the most important thing,You have to enhance your comprehensive quality.So I joined many school clubs,such as chess associations,associations of love,then I joined the Student Union.I worked as a tutor,during summer vacation,I went to a landscape company for practical training.These experiences let me learn a lot of things,It taught me the importance of collaboration with people,No one can rely on their own strength to do a concert、No one can rely on its own strength to do a project、No one can rely on its own strength to do such a job interview.You need a lot of help,In order to get help from others.You have to know how to pay,how to Thanksgiving,how to work with others.Face with the new work and new environment,I will put the most enthusiasm to my work.

我费了九牛二虎之力,思考你文章的顺序,前后衔接问题,摸出你要表达的意思.原来我很少用美语翻译,我怕中国书本上教出来的后生们没见过,不认同.错了错了怎们会这么说.就随大流,我现在不想随大流.我改的文章你觉得还可以,你就拿去用.你觉得还有什要改的,打追问.我觉得不是学英语专业的能勇敢地把自己东西亮出来,就很不错了.不要求全责备.我们要是在他的处境,不见得比他好多少.当然我的水平,还是相当有限.向大家学习
.Good afternoon ( Good morning ),I am very happy to introduce myself to everyone of you.In fact,five years ago,I was a pretty shy boy,My face often blushed when I talked with girls.
After I entered the university,I have found the acdemic record was not that important as it used to be.All you need to do is to improve your comprehensive ability.Enlightened by these,I joined in several school clubs,such as,the chess association,the association of loving and caring and the Student Union.Once we started our summer vacations,I would go to work as a tutor ,it was fun to be with kids.It was really a good time.You don' t want to miss it.Can you imagine that I even worked as a trainee in the landscape company.These fun events have given me much knowledge which can not be learnt in the books.and I have come to know it is important to cooperate with people .It is called team work.It will be unrealistic to work without others.Can one man make a vehicle by hisself/herself?Everyone will say "No",it needs a large number of people.We all know our ability is limited.So the team work plays a tremendous role in the trades,industries,profesions,markets,banking and so on.
In our daily life,we also longing for help from other people,So first everyone should learn to care for others and help each other and care about each other.loving is important also,it will make our nation strong and make people close and warm.Gratefulness is indispensable .Everyone should be thankful for the help ,care,love you received and achievement you made.Especially we should thank people who help us obtain all of these.Our young people should dedicate ourself to our nation.
Oh,I will let you know I am not shy any more.I have become a open boy.Those activities helped me a lot.With so many experiences I learnt within four years,I am ready for work,I will try my best to do my job well ,to be a good staff.and to apply what I learnt to my work and to learn from others so as to enrich myself .It is possible to accomplish my goal for the work I am looking forward to.
(美语） That is it.Thank you.