You will now be logged into your Horizon Wallet. As this is the first time you’ve used it, it needs to download the Horizon blockchain. Depending on the speed of your connection, this can take anywhere from 20 minutes to several hours. You’ll be able to see the download progress by looking at the progress bar in the bottom right-hand corner of your wallet.
THIS IS A ONE-TIME ONLY PROCESS, ALTHOUGH IF YOU ARE USING THE WEB WALLET, YOU DON’T NEED TO WAIT AS THE BLOCKCHAIN HAS ALREADY BEEN DOWNLOADED.
Your wallet will also show your Horizon address. This is outlined in red on the screenshot and it is unique to you.
As you will be waiting for the blockchain to download, you might as well get yourself a cup of tea and a biscuit. Use the biscuit to dunk into your tea and then munch it thoughtfully as you ponder the awesomness of Horizon!