Help with a Goolock build.

So my Yuan-ti Pureblood warlock is level one right now, and her patron is Yidhra the Dream Witch(From H.P. Lovecraft). I have 16 int, and 16 Cha. I know I don't need Int, but I want her to be an extremely smart warlock, but I don't know what invocations, or cantrips(when I get pack of tome) to take. I really want them to fit the flavour of her always seeking out knowledge. Any ideas on the first three levels of so?