I want to create custom email header and footer inc. logo. I need different translations for the email labes, a different logo and customized header and footer.

Hi Guys,
a am new to Magento 2. i want to create custom email header and footer inc. logo. how can i do this.
i need different translations for the email labes, a different logo and customized header and footer.

how can i override the original files and pathes and where to place the overrides in my theme?

i really would appreciate any help to get it done

best regards Ludwig