If you selected Peer to Peer (P2P) payment method. your order has only been submitted. You would have to make Payment either through Zelle or Cash App for your order to be processed and shipped.
If you had selected and paid through a credit/debit card, there is nothing you need to do. You can check your order status under My Account > Orders. Your order has been Paid and ready to be shipped if your order status is Processing.