Hi, purpose, welcome to the forum! There must be a LOT of competition in Atlanta, Georgia, because we've had several newcomers to the forum ask about Atlanta assignments.
All the information you need to begin mystery shopping is available on this website. It's set up as a learn-as-you-go, work-at-your-own pace process. When you mystery shop, you are actually running your own small business, working as an independent contractor for multiple mystery shopping companies. In the beginning, mystery shopping is very time-consuming. You will spend a lot of time reading so you can understand how mystery shopping works. You will spend a lot more time researching and planning and setting up your business. You'll spend even more time registering with companies, providing your personal information and SS#. Some of the companies will want you to provide a writing sample or take tests.
Very time-intensive. Don't get discouraged. Plan to spend a lot of time in preparation before you start making any money. You'll spend a lot of time sorting through jobs to decide which ones are "worth it" to you and finding companies that have assignments in Atlanta. When you do start getting assignments, most will not be quick, easy, fast, or fun. And most will not pay very much money.