Hello, 

I have corrected your text, but I advise you to be careful. Offering to pay with shoes instead of money could be against the TOS of italki. 

Hello Everyone

Hello everyone, I'm back!

I have so many much free time today, and I want to find someone who can teach me English. Of course, I would like to teach her Chinese, or send some gifts to her, for example shoes, books etc. because I'm a seller. I selling shoes online.

Hello everyone

Hello everyone,  i  I'm back, .   i  I  have so  many  much  free time today.  i  I  want to find someone who can teach me English.  o  Of course,   i  I  would like to teach her Chinese, or send some gifts to her,  (for  example,  shoes  or  books),  because  i  I'm a seller,  i  selling shoes online.

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Hello everyone

Hello everyone, I'm back. I have so much free time today. I want to find someone who can teach me English. Of course, I would like to teach her Chinese, or send some gifts to her (for example, shoes or books), because I'm a seller, selling shoes online.