There is no need to create an account. You can purchase and checkout as a guest without an account.
However, having an account means faster checkout. Since all the billing/ shipping addresses are in place, precious time is saved. It also makes it easier to track current orders and view order history.
To create an account simply check the box “Create an Account” on the Checkout Page.
You can purchase my prints on Etsy as well.
Both of us shall be happy.