Are you using services
? And do you know how their header/logo sizes and how to design them?
Most important problem at the moment with facebook is, if you post the link https://www.whonix.org on your wall, you only see part of the banner.
Facebook and twitter would be more important. I am looking up some information on header and logo sizes; header and logo overlap. (https://www.whonix.org/wiki/Dev/Logo) Some places require rectangle style logos, others elongated style banner. That information will also be required for a possible future logo contest.
Currently Whonix’s facebook/twitter account designs are using a Whonix desktop screenshot, which I did out of despair ;), due to lack of design skills. Ideally those account designs should reflect what Whonix is about.
Some designs, I find informative and professional: