关于我自己

I wrote a little introduction about myself. Please read and advise if I need to make any correction.
谢谢!

你好。我的名字叫Andrew。我是今年31岁。我来自韩国。我做的营销启动的现在在IT公司做营销方面的工作。我一直生活在洛杉矶为5年我在LA住了五年。我能够说一口流利的英语和韩语流利。我前几天开始学习中文国的前几天。我热爱很喜欢旅行旅游和观看体育比赛。我也喜欢吃不同种类各种各样的食物。

1. I'm not too sure what you mean by “营销启动”, so I put in "I work in sales in an IT company"

2. Remember word order in Chinese - I live in LA for 5 years - 我再LA住了五年。

3. Adverbs are "adjectives + 地" in Chinese. So alternatively, you can say “我可以流利地说英语和韩语。”

4. Again, word order - I a few days ago started to learn Chinese - 我前几天开始学中文。

5. 热爱 does mean to like something very much, but it's usually used in a more serious context, like 你热爱生活吗？Do you have an ardent passion for living?

6. 观看 - again, this does mean "to view", but is used to refer to viewing videos mostly, and sometimes carries a formal undertone. For example, you can say, "我很喜欢用土豆观看视频", I like to watch videos with Tudou (the Chinese Youtube). 

7. 不同种类 is rarely used with food, to give you a sense of how it's used, think "不同种类的鸟" - different species of birds; “不同种类的食品包装” - different types of food packaging, etc. 

Hope this helps! 

Good luck with learning Chinese! :)

关于我自己

I wrote a little introduction about myself. Please read and advise if I need to make any correction.
谢谢!

你好。我的名字叫Andrew。我是31岁。我来自韩国。我做的营销启动的IT公司/我在一家IT公司做营销启动。我一直生活在洛杉矶为5年我在洛杉矶生活了5年。我英语和韩语很流利。我开始学习中国的前几天。前几天我开始学习中文/汉语; 我热爱旅行和观看体育比赛。我也喜欢吃不同种类的食物。

1. Firstly, good essay, since you said you only have learnt mandarin for several day. So far so good

2. In English the sentence is usually put in this way"I do something in someplace", right? But in

Mandarin, the situation is the other way around> we use "I in someplace do something", let's see

an example, okay? Let's say "I drink tea in a teahouse", but in Mandarin, as I mentioned before, it's

"I in a teahouse drink tea", "我在茶房喝茶", which is why I corrected your "我做的营销启动的IT公司",

because in Mandarin word-order it should be "我在IT公司做营销" "제가 IT회사에 다니다"

3. The second similar error> 我一直生活在洛杉矶为5年, "I in someplace do something" "I have been living in LA for 5 years" -->"I in LA have been living for 5 years"-->"我在LA生活了5年"

4. When we render "I can speak one language very well", we are usually all"I can one language speak well", it's a little tricky, but that's how we speak in daily life> I speak English well=I English speak well=我英语说/讲得很好

5. 我开始学习中国的前几天. When ya want to say "I start to do something xx days ago", then you'd better use "xx days ago I start to do something", we rarely place "time" at end> I started to learn Mandarin some days ago= Some days ago I started to learn Mandarin=几天前我开始学习中文

6. 中国=China the country[중국]; Mandarin/Chinese the language[중국어]

关于我自己

I wrote a little introduction about myself. Please read and advise if I need to make any correction.
谢谢!

你好。我的名字叫Andrew, [今年]我是31岁, 。我来自韩国 or 在韩国出生/世。我是个IT公司的做的营销启动的IT公司职员, 已我一直生活在洛杉矶[or 罗省]为住了5年。我的说英语和韩语都說得流利。前几天我开始学习中文国的前几天。我热爱旅行与和[since you are using a rather formal term of 观看, you can omit 观 and it becomes less formal sounding]观看体育比赛, 我也喜欢吃各种不同种类的美食[cuisine]物。

关于我自己

I wrote a little introduction about myself. Please read and advise if I need to make any correction.
谢谢!

你好。我的名字叫Andrew。我是31岁。我来自韩国。我在一家IT公司从事营销启动工作我做的营销启动的IT公司。我已经在洛杉矶生活5年了一直生活在洛杉矶为5年。我的说英语和韩语都说得很流利。我开始学习中国的前几天我开始学习中文。我热爱旅行，喜欢看体育比赛，而且我还喜欢吃各种不同的食物。

A comma is used in Chinese writing to seperate the clauses, and if you are talking about the same subject, it can be omited.

For example:

我叫Andrew，31岁，来自韩国，在一家IT公司从事营销启动工作。

关于我自己

I wrote a little introduction about myself. Please read and advise if I need to make any correction.
谢谢!

你好，我的名字叫Andrew。我是31岁，我来自韩国。我的工作是做的营销启动的IT公司。我一直生活在洛杉矶，已经生活为5年了。我说流利的英语和韩语流利。几天前，我开始学习中文国的前几天。我热爱旅行和观看体育比赛，我也喜欢吃不同种类的食物。