Hey guys, I am a college student and I've just been approved for a BoA cash rewards card with an $800 limit. I had no credit history prior to this card and no income. Just want to ask, when I applied for this card I clicked on a link which gave $50 cashback for $100 spending. There is actually another offer for the same card which gives $100 for $500. Is there a way I change this to get the 2nd offer instead?

Also, given my success with the BoA card, should I try for any other cards i.e. airline cards? What should my next few moves be? Would appreciate all the help!