Hey! Welcome to the forum. I'll also be a Junior this fall at U of A in Tucson, AZ
I've been in the game for 2 years now, and just got approved for my 12th, 13th, and 14th cards today, with 15 and 16 pending approval.
Ignore everyone who says you should go for cards with no annual fee. Cards with no annual fee (for the most part) don't give you big bonuses and allow you to travel for free!! Most cards offer no annual fee *for the first year* so you can downgrade at 11 months, age your credit profile, and get some huge bonuses.
ALL depends on your FICOs. Go to MyFico.com and get all three scores. it's about $60 but is entirely worth it. If all goes well, I'll be on Citi AAdvantage Card number 5 with 1 year AAoA, oldest account at 2 years, 1 month, 35k income, and 730EX, 730EQ and 710 TU at time of application.