Hey @B_BOHEME, This is AiTrillion- an All-in-one Marketing Platform on Shopify. You can simply do this with the app also. You can easily create a newsletter and enable it and do the full customization as per your preference. There are many pre-built templates available.
If you have any questions, feel free to ask.
You can install the all-in-one app AiTrillion.
P.S- Free plan available, you can install AiTrillion for free here.