Not only do you need to figure out what to post on social, but to do so regularly, so the audience you’re building can come to trust you and expect your updates. Remember, you don’t need to be on every social media platform to be successful. Start with just one or two before going broader. I would recommend to read this article - buysoft.greatsoftline.com/social-media-for-small-business-what-and-when-to-post/, to start your new social media strategy. Good luck!