The ONLY way to be sure you are paid is to check your PP account.
As a new seller, your customer's payment will be Held by PP against your good service for 21 days.
You still have to ship promptly.
Don't worry, it will be fine.
You can use the Held funds to pay for a PP shipping label. Many of these have a 5% to 18% discount off PO counter prices.
If you are warned before printing the label, there is no money, even Held money, in the account and you should not ship.
It is a good idea to do some buying here before starting to sell. Many experienced members advise buying shipping supplies and choosing sellers who leave feedback on shipment.
BTW-- it would be a good idea to add how many cups that teapot holds to your description. You have 80 FREE keystrokes to attract customers. Use them.