How to convert TNC to BTC?

Excuse me, could you please explain the process of converting TNC to BTC in simple terms? I'm relatively new to the world of cryptocurrency and would appreciate a step-by-step guide on how to go about it. Are there any specific platforms or exchanges that you recommend for this conversion? Additionally, is there a fee associated with the conversion, and how do I ensure that the transaction is secure? Thank you in advance for your assistance.