Hi! Where I can find the rules? I cannot make a page or a group yet and I want to know how to promote my products on the platform. Or you have to be pro for starting a page or group?

I am writing to you because when trying to publish blogs on the platform a system error occurred; My publications did not appear. So I tried several times without success, then gave up. And now I find myself with my blog posts repeated several times, and I can't delete them.
My intention was not to post repeatedly, please, I need to delete the repeated posts.