用中文學習

你好。我是 Eric。昨天用中文我的寫了我第一篇的短文學習練習。現在我有很多中國的人朋友。 我的中國人朋友改我的錯幫了我改錯。這是對我來說非常有用的。我很高興。我希望完善我的中文說的快可以儘快把中文說得更好（1）。就這些眼下。今天先到此為止。 

再見

Notes

1. "I hope I can improve my Chinese soon" est un peu difficile à traduire. Je l'ai changé donc: "I hope I can speak Chinese better."

J'espère que ça t'aiderai. Bonne chance. :) 

用中文學習

你好。我是 Eric。昨天用中文我的第一次写了一篇短文學習。現在我有很多中國人朋友。他们把 我的中國人朋友改我的錯誤更改。对我很這是有用的。我很高興。我希望能够快快有進步完善我的中文說的快。就是這些了眼下。 [You really don't need this phrase as it is not culturally the way to end the note.]

再見

Hello. My name is Eric. Yesterday I wrote my first note in Chinese. Now I have a lot of chinese friends. My chinese friends They correct my mistakes. This Their help is very usefull . I am very happy. I wish I will improve my Chinese soon. That's all for now.

I kind of translate "word by word" which is probably not very good. I wish I could find a good online dictionnary with some examples and context... Any advice is welcome.

謝謝

It is a great starting point to translate word by word and then have a native speaker correct it.  This way, you can see the differences not only in grammar, structure but also the cultural preference in doing things.  Here's a good online dictionary which I used.

http://www.mdbg.net/chindict/chindict.php

用中文學習中文（Learning Chinese）

你好。，我是 Eric。昨天用中文我写了的第一篇中文短文學習。現在我有很多中國人朋友。 我的中國人朋友纠正改的錯误。這很是有用的。我。很高興。我希望尽快完善（here to use提高is better as you are a beginner ）我的中文說的快。暂时就這些眼下。

再見

Hello. My name is Eric. Yesterday i wrote my first note in chinese. Now I have a lot of chinese friends . My chinese friends correct my mistakes. This is very usefull. I am very happy. I wish i will improve my chinese soon. That's all for now.

I kind of translate "word by word" which is probably not very good. I wish I could find a good online dictonnary with some examples and context... Any advice is welcome

謝謝

用中文學習

你好。我是 Eric。昨天用中文我的第一篇短文學習昨天我学习了我的第一篇中文短文。現在我有很多中國人朋友。 我的中國人朋友改我的錯。這是有用的。我很高興。我希望完善我的中文說的快我希望我的中文能很快的提高。就這些眼下暂时就先这些。

再見

Hello. My name is Eric. Yesterday i wrote my first note in chinese. Now I have a lot of chinese friends . My chinese friends correct my mistakes. This is very usefull. I am very happy. I wish i will improve my chinese soon. That's all for now.

I kind of translate "word by word" which is probably not very good. I wish I could find a good online dictonnary with some examples and context... Any advice is welcome

謝謝

用中文學習

你好。我是 Eric。昨天我用中文我的練習了第一篇短文學習。現在我有很多中國人朋友。 我的中國人朋友修改我的錯誤。這是有幫助用的。我很高興。我希望能夠很快地完善我的中文說的快。就這樣些眼下。

再見

Hello. My name is Eric. Yesterday i wrote my first note in chinese. Now I have a lot of chinese friends . My chinese friends correct my mistakes. This is very usefull. I am very happy. I wish i will improve my chinese soon. That's all for now. 

I kind of translate "word by word" which is probably not very good. I wish I could find a good online dictonnary with some examples and context... Any advice is welcome

謝謝

Sometimes all you need to do is to reorder "word by word translation" a bit and add a little modification. It's not a terrible approach. I am not aware of any good online Chinese dictionaries but dictionaries published by 國語日報出版社 are held in high regard in the place where I am from. 

1. "第一篇短文學習" could be a proper noun seen in some grammar books. But for people outside your classroom reading this, they probably wouldn't immediately realize it and the phrase would likely cause a pause when it is read.
2. "中國人" is a noun, "朋友" is another. Although we sometimes use a noun to modify another noun that follows right after it (such as 橡木傢具 or 塑膠筷子), the first noun really functions as an adjective. So it would sound much better if it is written as "中國朋友" instead of "中國人朋友".
3. "這是有用的" can mean "it's very helpful," but colloquially, it can also mean "it is used/intended for something." Just to avoid ambiguity, maybe it is better to make it clearer for reader.