FYI, this will show up at the of every email you send out to your subscribers. This is important because when you input your address in the Account Information section, you may have used the address associated with your credit card. This is usually a home address. So I’d advise renting a PO Box so you can use that address here. It keeps your home address private.
Before you can send AWesome emails with AWeber, you'll need someone to send it to. The easiest way to begin building your list is to import contacts that have opted-in to your email list, or gave you permission to send them emails. These could be subscribers you've emailed from another provider, or a list of contacts that you've built through your business.