How to purchase USDB in India?

As a cryptocurrency enthusiast in India, I'm curious about the process of purchasing USDB. Could you elaborate on the steps involved? Firstly, do I need to register with a specific exchange that supports USDB trading? Secondly, what are the payment options available for Indians to purchase USDB? Are there any specific requirements or restrictions I should be aware of? Additionally, how secure is the process of purchasing USDB in India, and are there any measures I should take to ensure the safety of my investments? Lastly, are there any tax implications or regulations I should consider before making a purchase? I'd appreciate a detailed explanation of the entire process.