I'm Miles from the Social Care team at Shopify. Welcome to our community forums!
Sending your customers' emails is a great way to connect with them. A welcome email helps customers see everything you've got to offer and learn a bit more about your business.
At the moment, we don't have a built-in solution for email marketing, but we do have some great apps in the App Store. I've selected a couple for you below, but there's plenty more to choose from as well!
We also have a great free Email Marketing course on our Shopify Academy which I would recommend checking out.
I do not know how to set up manually but I think you should try some apps which can help you do it easily and automatically. The app I'd recommend is Hello Email app. This app has some features that may interest you:
This app is absolutely free and has a high rating from users. To get the detail about this app and others, you see here
Oh, sorry @fleur747
It's my fault, my friend. It's must be Happy Email app but I typed it incorrectly. You can get that app and 40 other email apps via this link https://avada.io/shopify/email/