大家好 (＾ｰ^)ノ

今天学中文。 我爱中文。我来的中文学院。我姓Tanya。我有爸爸， 妈妈。再见！

今天学中文！我爱中文，它十分美好。我来到中文学院学习。我姓Tanya，家里有爸爸，妈妈和我。再见！

This is a very lovely, brief , straightforward mini article, very good! 

Here I followed your style, only added a reason for loving Chinese language. I added a complement for the third sentence to make the grammartical structure complete.The addings make the rhythm of your talk becoming slower. Do remember that Chinese is a rather musical, melodic language, like Bollywood!:) I used different punctuation, to let you be excitedly in and excitedly coming out:0). Of course you can punctuate your article in another way to express different mood, emotions and personality, that supposed to be freedom. Only one mistake with using verb ”来“ ; it is vi. here. And " ”家里有......" is a very popular, sweet way for introducing one's family.

OK, this is just a new start, Tanya. Gradually you will sing and dance your Bollywood of Chinese words more beautifully! 祝你成功！

Susan

大家好 (＾ｰ^)ノ

今天(我)学了中文。I learned/studied Chinese today. ‘了’ is often used, when you want to describe something that happened in the past.

我爱/我喜欢中文。I love/like Chinese. Often I use '喜欢'.

我会去中文学院。I will go to the college of Chinese. Are you sure you meant 'the college/university of Chinese, not the college/university in China(中国的大学).'？

我姓Tanya。My family name/last name is Tanya.

我家里有三口人，爸爸、妈妈和我。There are three members in my family, my father, my mother and I.（If it is four members, then 爸爸、妈妈、姐姐/哥哥和我。）

再见！

大家好 (＾ｰ^)ノ

今天学中文。 我爱中文。我来的中文学院。我姓叫Tanya。我有爸爸， 妈妈。再见！

我今天（开始）学中文，我喜欢中文，我（第一天）来到中院，我叫Tanya，（和我一起来的）还有我爸爸妈妈？谢谢。

大家好 (＾ｰ^)ノ

今天学中文。 我爱中文。我来的在中文学院。我姓Tanya。我家有爸爸， 妈妈，还有我。再见！

not bad！ 加油！