Why would you ask someone to make a signature for your email when it's 15 minutes of playing. We have posted two video clips, one for Thunderbird and the other for MacOS. Maybe we'll set one for Outlook as well, when they become good.
Online you have a sea of generators for HTML email signatures or if you have the knowledge and time to create something unique. That is, I hope that in the future we will post several articles describing the entire html process.
But for now, this is more than enough, because there is a large selection of templates where everyone will find something acceptable, and everyone can modify it completely anyway.
If you don't understand how HTML works at all, there are many websites with automated free html editors.
For example: https://blog.gimm.io/apple-mail-email-signature/
Create a signature, copy the code, and insert it into the file shown in the video clip, just follow the procedure from the video.