It honestly depends on where you go if you would be admitted to rush, but honestly I do not see it happening for you. Rush is only about a week, but the New Member Process takes almost an entire semester. Not to mention that you wouldn't be quite as useful in volunteering because you'd have to concentrate on your studies. Just sit back and make new friends!
Actually for many groups, the NM process only takes 6 weeks.
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It is all 33girl's fault. ~DrPhil