To create a page simply go to the "Layout"->"Pages" in your dashboard. Click the "Create a new page" button. You can also order your pages by entering an order number.
For Premium pages, you can copy & paste the embed code from your Premium plans detail page. This will put a "Buy Now" button on your page. Users can click the button and pay you directly in PayPal.
Please make sure you are using the html edit mode when doing this (the last icon on the toolbar: “show source”)