How can one serve the religion through financial and banking sciences after graduating with a good GPA?

The science of economics and finance is important for the sustenance and livelihood of people. Allah Almighty says: "And do not give the foolish your property, which Allah has made a means of sustenance for you." This knowledge can benefit religion by creating models for legitimate and successful commercial and investment projects, advocating for an Islamic economy free from usury and gambling while explaining the differences, and working and cooperating with Islamic banks committed to Sharia rulings.