Hsn card question

Hi everyone. I was approved for an hsn card on 9/20 when I was checking out. I put my order on the card. I went to go set up my payment stuff for the card but can not because I don’t have my account number yet as I have not received the card in the mail.  How long does it usually take to get the card? I’m worried my bill will be due before I get the card and have chance to set up payments to the hsn card. And I don’t want it to be late.,would they make the bill due quickly or do they take into account you just applied and wait before they bill you? I know I’m probably worried over nothing but I’m a natural worrier.