How do you pay on AXS?

Could you kindly explain to me the payment process on AXS? I'm a bit confused about how it works. Do I need to create an account first or can I make a purchase directly? Also, what payment methods are accepted on the platform? Are there any fees associated with making payments on AXS? It would be helpful if you could provide a step-by-step guide on how to go about the payment process. Thank you for your assistance.