Welcome to the forum!
Have you asked KeyBank if there is any scenario where they can first try a soft pull? If you haven't done so already, I would recommend asking if they can check your account to see if you will qualify for any sort of increase, even a small one, using a soft pull only. Most card issuers will do this but given that you are newer to credit, it may not be an option on your account yet.
Since you were just recently rejected for the Freedom, you may wish to try this strategy: a 20 year old student successfully convinced Chase to re-consider and approve him after being denied 2x.
If you want to try for a new credit card, I would advise waiting since you have 2 hard pulls within the last month.
Ideally, it would be preferable to wait 6 months after, when the value of those two inquiries diminish.
Since you are still a student, your best bet for next time may be to apply for a student card since the approval will be easier. The limits on them will be low but at least the odds of approval are better. You can compare a few sponsored offers on this page: credit cards for college students
For a regular, non student card, you may want to check out the Citi Forward. There are two versions - regular and student - but several students on the forum with little to no credit have reported getting approved for the regular version. To give you an idea of its target audience and age range, it was originally launched in 2009 as the Myspace card. It is listed on the CCF's sponsored offers section for cash back cards