i didn't really learn makeup as a teenager

flist, i have a question for you. sometimes, when i do not sleep well (or, uh, do not sleep because i'm noodling around on the internet til 2am), i, like many people, get dark circles under my eyes. however, this does not go well with the image i am trying to project at work of being competent and on top of things even at 9am.

now, i realize that the obvious solution to my problem is 'go explain this to the nice ladies at sephora and let them sell you things' which tbh is probably what i will end up doing. except i find sephora a little intimidating when i have zero idea of what i'm looking for, so, uh, could you tell me a little bit about what some of my options are? and, possibly, how idiot-proof they are when you are moderately sleep deprived and not a a morning person?