For the long term, WooCommerce is absolutely better than Shopify for its customization and a large number of plugins. However, you’re new to eCommerce or you don’t want to bother about technical details, go for Shopify. Also, if you’re looking to test things and try a few products, try out Shopify's 14-day free trial now to see how it works.

Shopify is super user-friendly and you get a bunch of option without a paid subscription too -- so I would say Shopify if you're a total novice!

How much web development experience do you have? Shopify if none, WordPress if a lot. How much time do you want to spend keeping it up to date and running? Shopify if none, WordPress if a lot.

It's a platform, not a business. Don't be misguided with what's the best answers. That shouldn't be your main focus. Keep your investments low before you have a product-market fit. That is something 90% of people have a problem with. Start with Shopify and keep it as lean and simple as possible.

As long as you don't have more than 50k products I would recommend Shopify. The biggest reason for me is that way you don't have to deal with quarterly scans for PCI-DSS compliance. Shopify is a tier 1 provider, so you don't have to pay for that scan and don't have to worry about the latest zero-day exploit in WordPress or one of the plugins you are using.