No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
Is it a "Pre-approval" or "Pre-selected"? If an approval should give you a fixed interest rate. If Pre-Selected it's just a normal mail offer and should have a range of interest rates. Have you gone to their pre-qualify site?
I would wait, they'll mail another
I would either wait until they send another one, or I would go to the pre-qualify site and see if there's something available.