How can one become rich while being a university graduate with an average personality?

There is nothing in Islamic law that prevents a Muslim from aspiring to wealth, as long as it is in accordance with the Shari'ah's regulations. The greatest wealth is being rich through Allah, the Exalted, as Al-Sha'bi said: "Therefore, be rich through Allah, detached from the worldly possessions of kings, just as kings became detached from religion through their worldly possessions." And Ibn Al-Qayyim said: "If people become rich through worldly possessions, then you become rich through Allah. And if they seek to become acquainted with their kings… then you seek to become acquainted with Allah and endear yourself to Him; by doing so, you will attain the ultimate glory and eminence."