HTML coding for email

Hello - we are a small yoga studio looking for someone to create some HTML code for us that we can use in our automated emails from our booking software that make them look more professional and engaging. For example, we would like them to have a background colour, a different banner image at the top, our logo, and heading style.

The emails need to be in keeping with our house brand and style (font, colours etc) which is illustrated by our website theshalalondon.com. This may lead to further work in the future with us too!