أي مجال عمل تنصحونني به من بين التدريس، أو توثيق العقود، أو القانون النفطي، أو القانون الدولي، لكي يرضي الله تعالى، بعد تخرجي من كلية القانون؟

There is no objection to your working as a teacher, a notary public, or in any of the other fields mentioned, provided that you do not teach a forbidden science or notarize an invalid contract, such as contracts for selling alcohol, and that the profession itself does not involve anything contrary to Islamic law. As for working in law as a lawyer, the default ruling is permissibility, provided that you do not assist an oppressor in his oppression, establish falsehood, or annul a truth.