Hi, everybody

It's This is the first time I have come here. I do not know what to say.
My English is not good, I want, I am solicitous of I would like your help.
I come from China.  I can speak Chinese. If someone anyone* wants to learn Chinese, I think we can teach each other here.
Forgiving me for the first time I come here,I cant ues it masterly. Please forgive me, for this is my first time here, and I have not yet mastered it.

*"someone" isn't entirely wrong, but "anyone" sounds more natural

Remember to put a space after ","

Hi everybody!

It's the my first time I come here and I do not know what to say.
My English is not good,I want,I am solicitous of and I need your help.
I I come from China and I can speak Chinese. If anyone someone wants to learn Chinese I think we can help teach each other here.
Forgive me; for the this is my first time I come here. I cant use it wisely.

:)

Hi, everybody!

It's the first time I have come here/It's my first time here, and I do not know what to say.
My English is not good, I want, I need, I am solicitous of your help.
I come from China, I can speak Chinese (naturally! 哈哈哈）. If someanyone wants to learn Chinese, I think we can teach each other here.
Forgiveing me for the first time I come my first poor effort here, I can't use it so masterfullly.