To upload a product in WordPress WooCommerce, follow these steps:

1. Log in to your WordPress dashboard and navigate to the WooCommerce tab in the left-hand menu.
2. Click on the Products tab and then click on the Add New button.
3. Enter the product title, description, and any other relevant information in the fields provided.
4. Add product images by clicking on the Set Product Image link and uploading your image.
5. Set the product price, shipping options, and any other relevant information in the Product Data section.
6. Add any product variations, such as different sizes or colors, in the Variations section.
7. Set the product categories and tags in the right-hand menu.
8. Click on the Publish button to make your product live on your website.

In WordPress WooCommerce, there are several types of products you can create:

1. Simple Products: These are the most basic type of product in WooCommerce, and they have no variations. Examples of simple products include a t-shirt or a book.
2. Variable Products: These are products that have multiple variations, such as different sizes or colors. Customers can choose the variation they want before adding the product to their cart. Examples of variable products include a shirt available in different sizes or colors.
3. Grouped Products: These are products that are sold together as a group. For example, if you sell a set of cooking utensils, you can group them together so customers can buy them all at once.
4. Affiliate Products: These are products that are sold by other companies, but you earn a commission when someone buys them through your website. You can add affiliate products by using a plugin like WooCommerce Amazon Affiliates.
5. Virtual Products: These are products that don’t have a physical presence, such as a digital download or a subscription service.
6. Downloadable Products: These are products that can be downloaded by the customer after purchase. Examples include ebooks, music files, or software.
7. Composite Products: These are products that are made up of several different components. For example, if you sell custom bicycles, you can create a composite product that includes the frame, wheels, and other components.