Now that you found an option for an OS?, it is now time to download the file. Look for the official download page, and do not download from other unofficial sites. Downloading from these locations can lead to viruses, or bad files in your computer. Also, make sure you pick an OS from a reputable source, You should have done this in Step 01. Depending on your internet connection speed, your download can take a while. Keep in mind that most Linux .iso files are more than 1GB large, and that could take some time. Just give it the time it needs. I know you want to get started as soon as possible, but this step is basically a waiting game.