tl;dr: skip school, work on your portfolio at your own pace

Without getting into an anti-higher-ed rant, the cost of going to school (tuition + opportunity cost of not-working) is not offset by the benefit of knowledge + credentials.

You could also try to find work at a smaller company/start-up where you might take a relatively junior role that would enable you to get some professional experience doing "Information Technology Decision Science" (not quite sure what that means, by the way). In any case, employers place more value on real experience vs school in most cases.