How do I pay Amazon with cryptocurrency?

Hello, I'm curious about the process of paying for purchases on Amazon using cryptocurrency. Could you elaborate on the steps involved? Do I need to convert my crypto to fiat currency first, or is there a direct payment option? If so, which cryptocurrencies are supported, and are there any associated fees or limitations? I'm also wondering about the security measures taken to protect my crypto transactions, as well as the estimated processing time for such payments. Your insight into this process would be greatly appreciated.