How to think like an economist?

Hello,

I'm a student in public health (last year of my master's degree), and I'm doing health economics for the "first time" (i m a political science major, so I did not really study economics that deep even though I have some good basis in microeconomics and macro).

I'm gonna do a presentation about a policy in an health economics class. And I'm kinda stuck because I have the data, the findings in the litterature, but I noticed that I can't think like an economist and can't have their critical thinking. In my mind, I m always stuck analyzing more political institutions.

Can you give some advices please?

Thank you very much.