This. WooCommerce is very well designed and has an excellent plugin ecosystem as well. Yes it is WordPress but if you are looking for something open source and

This. WooCommerce is very well designed and has an excellent plugin ecosystem as well. Yes it is WordPress but if you are looking for something open source and self hosted, it is the easiest to get started with and has great documentation. For subscriptions, they have a paid plugin but it is totally worth it (used it for many years and works like a charm