How do you buy on Tiger?

Excuse me, could you please clarify the steps involved in making a purchase on Tiger? I'm a bit new to this platform and I'm not entirely sure where to start. Do I need to create an account first? And once I'm logged in, how do I navigate to the buying section? Are there any specific fees or commissions I should be aware of? Additionally, are there any safety measures I should take to ensure a smooth and secure transaction? I'd really appreciate it if you could guide me through the process. Thank you in advance.