In your WordPress administrator dashboard, navigate to the Products tab in the left sidebar. Then, click Add New.
Add a title, description, and featured image to your product.
Add additional product gallery images, input the product price, and select a category.
Add additional data as needed (such as SKU, stock status, product weight, shipping class, custom product attributes, etc.) using the tabs in the Product Data section.
When you have finished adding your product data, click Publish to save your changes and publish your product, or save it as a draft for later.
For more detailed information about product creation and configuration, reference the WooCommerce documentation at https://woocommerce.com/documentation/.