Rush at UIUC Fall/Spring

[Lola96]

Hey guys!

It's been almost a year since I posted on here :O
I'm an international student who just got accepted to UIUC (U of Illinois, Urbana-Champaign)! While I'm waiting for my other university decisions, I'm doing some research on UIUC (academics, social life, job opportunities and all that). I've considered greek life since sophomore year of high school (when I first learnt about it..) and I'd like to know more about the rush process for sororities at UIUC....I did go through their official website which was useful indeed but I have a few specific things I'm curious about -

1) At UIUC, are my chances of getting a bid better in Fall or Spring (informal)? How disadvantageous will it be to rush spring or sophomore year?
2) How are international student perceived during rush? (*ones that intend on staying all four years in the same university*) also, how culturally diverse are the sororities at UIUC? (I'm Indian btw)
3) Lastly, how much do looks come into play while getting a bid? ---> odd question perhaps? just curious so no offense!