Starting an online casino involves several key steps. First, research the legal requirements in your jurisdiction to ensure compliance with gambling laws. Next, choose a reliable software provider to develop your platform, focusing on user experience and security. Secure necessary licenses and payment processing options to facilitate transactions. Develop a diverse game portfolio, including slots, table games, and live dealer options. Finally, implement effective marketing strategies to attract players, such as bonuses and promotions, while ensuring responsible gambling practices are in place. With careful planning and execution, you can successfully launch your online casino.