To add your own account to live broadcast in Selected Alliance, you need to follow the steps below:

1. **Open e-commerce permissions**: Make sure your account has opened e-commerce permissions, which usually requires creating high-quality content and reaching a certain number of fans or interaction thresholds.

2. **Settle in Douyin Store**: If you have not settled in Douyin Store, you need to complete the settlement process first. After successfully settling in, the merchant experience score is usually >=4.0 points, so that you can automatically open the qualification of Selected Alliance.

3. **Visit Doudian Backstage**: Log in to your Douyin account, enter the Doudian Backstage, and click the "Marketing Center" option.

4. **Select Selected Alliance**: Find the relevant settings of Selected Alliance in the Marketing Center, and usually find the entrance to "Selected Alliance" in the navigation area.

5. **Plan Management**: Click "Plan Management" to enter Baiying's plan management interface. Here, you can add or manage your product plans.

6. **Add products**: Add the products you want to sell through live streaming in the general plan. Make sure the product information is accurate and complies with the platform rules.

7. **Start live streaming**: After adding the products, you can add these products to the shopping cart in the live streaming room and start your live streaming.

Please note that according to the latest platform rules, non-store products cannot be displayed in showcases and short videos, and a single live streaming room can only carry a maximum of 3 non-store products.