It's great that this question has been asked for some advice and there will be no simple answer to the question of what or how. KNUST is both, big and a small university. Depending on how you see life and what you want to accomplish.
Try to make friends and interact with everyone. Take part in industry visits, seminars conducted by visiting companies like TCS and Tech Mahindra. Top companies like Accenture, Wipro, Infosys also recruit students for internships. Always stay vigilant.