I am currently a first-year humanities PhD student. My university is ranked #1 for economics. It turns out that I also get significant leeway as to what I can do as a humanities PhD, including taking several courses in economics and mathematics. Lately I've been thinking about going back into economics, as there is not a lot that I can do with my humanities degree. In my undergraduate career, I took linear algebra and multivariable calculus, as well as a few courses in economics. I was thinking of enrolling in some economics and math courses for the next 2 years (undergraduate as well as graduate) and hopefully finding a research position and then applying to PhD programs in economics again. What do you all think / how should I proceed?