You don't have to know how to be a real person - you already are. Your mind and your thoughts are what matters, because that's what builds who you are. Do you have an opinion about something? Do you appreciate someone? Does someone appreciate you? When you witness something sweet, does your heart smile? Have you experienced pain, worry, pleasure, joy? Do you treasure your memories? Do you care? There, you are a real person of substance.
Yes, we are merely floating through this life, and will all eventuate in nothingness, and nothing will matter... But for now, you matter.