Where can I buy ServiceNow?

Hello there, I'm curious about purchasing ServiceNow but I'm not quite sure where to start. Could you please guide me on the platforms or marketplaces where I can buy ServiceNow? Are there any specific requirements or procedures that I need to follow in order to make a purchase? Additionally, is there a recommended method for beginners like me to navigate the process of acquiring ServiceNow? I appreciate your time and assistance in helping me understand this better.