I'To receive dogecoin you need a wallet. You can download the official wallet on dogecoin.com, or you can use a browser wallet like the one linked on this same site. If you choose to download the wallet, run it and you will be able to copy you address from the "Much receive" tab, but you will not receive any coins until the wallet is fully synchronized. If you choose the web wallet dogevault.com, you can get your address from the "Receive Dogecoin" tab,