Ideally, just enabling the Open Graph - Content plugin will set the tags best for your articles without you having to set each of those on every article. The content plugin will use the title from the page and you can setup an Open Graph object to set the description from the meta tag or using the first words or characters from the article automatically. The image also has some settings for choosing which should automatically be chosen.
In a perfect world, you only need to use those tags on a few articles that need something different than the defaults. In that case, you can add the tags anywhere in the article content that works for you. Usually, the image for an article is in your blog post already, so you shouldn't need to keep it in a separate directory, just reference the one you already have.
I hope that helps, but if you need anything else, please let us know.
Thanks,
Alex
EasyBlog
