Welcome friends to SiChuan

My hometown is ChengDu,SiChuan.I'm a Chinese college student.ChengDu is a very beautiful cityMy hometown Chengdu has is long history. I have a lot of students come from SiChuan.
I like the city, there is lots of delicious food and many scenery.I am a junior.Welcome to ChengDu,SiChuan.
我是一名中国学生，英语水平不好，希望各位朋友多多帮助，多多交流，谢谢！

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Maybe you can write like this?

Chengdu is my hometown. It is a very beauful city with a long history.  There is lots of delicious food and scenery (抱歉我记不清这个词是不是不可数名词). I like the city.

I am a Chinese college student, I am junior.  I have a lot of classmates who are from Chengdu.

Welcome to Chengdu, Sichuan.

感觉你介绍学校和自己的两部分穿插在一起，就不是很有条理了，是不是可以分别介绍呢？ - 个人意见！加油！