Once you have set up your account set up, you can test booking a private from your scheduling page in order to make sure it's working as you'd like it! You can do so by clicking on your private scheduling page.
Here are the best ways to test.
Make the price of your private session free
Create yourself a private promo code for 100% off
Under Gifts + Promos build a code for 100% off all of your services. When testing, you can apply that promo code at checkout. That way the service and free and you won't have to enter a credit card.
You can learn how to make a promo code here.