The first one is close but not quite right. You would more correctly say, "This is my first time eating sushi." But even that will sound weird in conversation. It would be more common to say, "This is my first time having sushi."
١ نوفمبر ٢٠١٧
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Evet Sue ablamız doğru söylemiş.
١ نوفمبر ٢٠١٧
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Hi. The second one is correct, but not the first. Good luck!