第一条记录。

nihao你好。我知道已经认识(have already know)150个字符汉字(chinese word)了。我教30每天我每天学习30个。希望那通过这个月我可以主学习小语法。

Well done Andrew, you can do better, I hope you can learn more Chinese and speak better!

第一条记录。

nihao。我知道150个字符了。我教30每天。希望那通过月我可以主小语法。

It is better to provide an English version as well for more accurate correction.  From what I guessed, you are trying to say,

我学识了150个字. 我每天要学30多个新. 希望到月底我可以掌握一些语法.  

I have already learnt and recognized 150 characters.  Each day, I would learn 30 new ones.  Hopefully by the month's end, I would be able to master some grammar.

Of course I may be wrong in my guessing.