You can take economics and learn the arguments of the capitalists and point out contradictions and hopefully turn some classmates against the "free market."
In this direction it is precisely the Marxist-Leninists who must be the most capable, the most wide-awake, the best organizers in order to become the subjective factor of the leadership of the revolution. In no way should we proceed from the idea that the conditions are not yet ripe for the revolution, or that the revolution cannot break out in the developed capitalist countries, therefore, we have to wait for it to develop in those states or continents in which the oppression, the forms and methods of exploitation are allegedly different from those in the metropolises. The working class and the Marxist-Leninist parties of the metropolises ought to give the peoples of various countries great aid, should assist their revolutionary movements. - Enver Hoxha The Marxist-Leninist Movement and the World Crisis of Capitalism