The poster suggest his time in the "liberal arts" taught him critical thinking, and yet states that the jobs available were "not up his alley" and now wants back into STEM.
What makes you think your decision making ability is any better now? Why STEM when you changed over to LA earlier?
Because you think you would get a job easier with a STEM oriented degree?
Would it be wiser for me to go deeper into debt and get a second undergrad degree?
When is it "wiser" to get into debt, much less get into debt deeper?
Go into the military?
For what reason finances?
There is something cognitively wrong with the person that wrote this, my suggestion is you talk to someone that is much older than you and understands the system, you seem to be making "unwise" choices and I would say you aren't capable of critical thinking currently.
Or you wouldn't be here asking what you're asking, talk to someone older and wiser in "real life".