One way to learn retail arbitrage is to do research on the products you want to buy and sell. Look for products that are in high demand, have low competition, and have a wide profit margin. You can use tools like Amazon's Best Sellers list, Google Trends, and CamelCamelCamel to help you identify these products.
You can join GBWhatsApp groups or download from
https://gbwa.download/ or communities that focus on retail arbitrage, and participate in discussions with other sellers. This can be a good way to learn about the latest trends, share your experiences, and get advice on the best practices for buying and selling products.