First Day at italk
It is my first day at (on) Italki. I think I need to write something as a landmark. Yay!!! I have been (in) the U.S. for (a year and a half / one and a half years) one year and a half. As my graduation day (is) coming soon, I want to cherish every day in the State(s) and make it (them) count. The (This) notebook will be my witness. I watched a chinese entertainment show today, called super brain最强大脑. I was so impressed by how powerful can human being's brains be(the human brain can be). There are (was) one that impressed me the most. He looks(ed) like a fool, not a normal person. He got a wired (weird)disease when he was little. It hurts his brain. However, he can easily calculate a difficult function with radical sign(s). The host wrote a function like 13 radical sign a number( with 14 digit(s)). He got the result that accurate(ly) to (a) single digit个位数 without draft without (using a)calculator. He got everything with his mind(did it all in his head). He is definitely a genius. I feel when God closes a door, he will definitely open (another) one for us. God bless you.
For much of what you said made sense, you simply made some grammatical errors in your writing.