Where can I buy core DAO?

Hello, I'm interested in purchasing CORE DAO, but I'm not quite sure where to start. Could you please guide me through the process? I've heard about decentralized exchanges but I'm not familiar with the specific platforms that offer core DAO. Could you recommend some reliable options? Also, would you mind explaining the steps I need to take in order to safely complete the transaction? I'm concerned about security and would like to ensure that my funds are well-protected. Thank you for your assistance!