How do I build real relationships with my mentors and give back?

You have found mentors, which is more than many manage. Building those into real relationships and giving something back still feels out of reach, and that is because relationships grow slowly and cannot be forced. Wanting to do it well is already the right instinct. Mentorship is not a transaction you complete. It is a connection you tend. You give back not by grand gestures but by showing up, following through on their advice, and telling them how it helped. Mentors give more freely to people who take their guidance seriously. After your next conversation with a mentor, do one thing they suggested and then tell them it made a difference. That small loop, advice followed and acknowledged, is how a passing connection becomes a lasting one.