How do I buy ICO?

Could you elaborate on the process of purchasing an Initial Coin Offering (ICO)? I'm interested in exploring this opportunity but am unfamiliar with the steps involved. Could you guide me through the process? I understand it involves research, identifying a legitimate ICO, and understanding the risks, but what specific actions do I need to take? Are there any platforms or exchanges that facilitate ICO purchases? Additionally, what are the legal considerations I should be aware of when investing in an ICO? I'd appreciate your insight on navigating this process.