This is how it works in the countries that I lived. Every order that placed before 14:00 or 17:00 (based on the shop/site) would be shipped the same day, others would be shipped next day.
Whenever you want to set up a shop and sell over internet, you would reach out to a shipping company and arrange a pickup time for your orders. The company truck visits every day at a specified time, then pick up that days orders for shipping.
Whenever you want to set up a shop and sell over internet, you would reach out to a shipping company and arrange a pickup time for your orders. The company truck visits every day at a specified time, then pick up that days orders for shipping.