At my school CIS was just CS/programming lite, I imagine at different schools the degree could be wildly different though? What kind of classes did you take?
I did take calc 1, linear algebra, physics 1 with calc 1, discrete math, algo/data structures but that's about it.
I'm definitely more of a self learner but I feel without the BS in Computer Science credential, I won't be taken seriously.
CIS is not CS, it's IT.