Facebook Cover and Promotional Posts

I'm in need of dynamic social media posts and a Facebook cover which blend both text and image-based content, with a promotional tone. The desired content should be designed with a clear understanding of my target audience— young adults aged 18 to 50. It must be attractive, engaging and designed in a manner that prompts active interaction and conversion. Ideal candidates would have a blend of graphic design skills and copywriting experience, with a successful track record in social media marketing. Understanding trends and preferences of this age group is a significant advantage.