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Hi Sean, About products, I have read that there are two kinds of online business: business who sell products that they themselves produce and manufacture, and people who purchase products from manufacturers and be an intermediary to receive benefit from difference in price. When you start business, the first thing to do is choose products to sell. It depends on your customer's needs, your budget and even your relationship. For example, you have a friend, who can help you to import laptop with cheap cost, you are thinking about it. However, you don't have enough budget and need to borrow, be careful. In my country, there are many online stores about clothing. Because capital is not too big and need of customer is high, especially clothing imported from foreign country. About platforms, if you have less technical knowledge, you should choose some simple platform such as WooCommerce. It is quite to set up, design, add product and control. Moreover, it is cheap. On the other hand, you have monetary resources and technical knowledge, i suggest you to use Magento. It is really amazing with powerful features. Here is top 10 popular e-commerce platform in 2015, I think you should read to choose suitable platform for your business. Check it: http://blog.litextension.com/the-best-ecommerce-platform-of-2016/ About online marketing, it is quite difficult to say in some sentence.