Customization of Plugin Features

Hey guys!
I have a few customizations that I would like to make to your plugin and am even willing to pay someone to help me make them.

Three things:
1. The subscription confirmation email I would like to add my website's banner to the top. (See current subscription email image attached)

2. The follow button I would like to customize, because in the "dark" schema the text is also dark and unreadable.

3. See image titled "Newsletter changes"