To become an Amazon seller in Qatar, you can follow these steps:

1. Determine what products you want to sell: Decide on the products you want to sell on Amazon. Conduct market research to identify popular products and niche markets that have high demand.

2. Set up an Amazon seller account: Visit Amazon's website and create a seller account. Provide the required information, including your business name, address, and contact information.

3. List your products: Once you've created your seller account, you can start listing your products on Amazon. Provide product descriptions, images, and pricing information. Make sure your product listings comply with Amazon's guidelines and policies.

4. Fulfill orders: When a customer purchases one of your products, Amazon will notify you to fulfill the order. You can either fulfill the order yourself or use Amazon's fulfillment services.

5. Manage your inventory: It's essential to manage your inventory levels to ensure that you have enough stock to fulfill orders. Use Amazon's inventory management tools to monitor your inventory levels and restock as needed.

6. Market your products: To increase sales, you can market your products through Amazon's advertising services or through social media and other marketing channels.

7. Monitor your performance: Keep track of your sales and performance metrics to identify areas for improvement. Use Amazon's seller dashboard to monitor your performance and identify opportunities to increase your sales and revenue.

By following these steps, you can start selling your products on Amazon in Qatar. Make sure to follow Amazon's guidelines and policies to ensure a successful and profitable selling experience.