I think the documentation is reasonably helpful!
If you read it again, it says that adding open graph elements on your website will make your website act as a facebook page and you'll get the ability to publish updates to them etc.
So I think it's up to you - you can either just have a page with no OG elements, which is less work but also less 'rewarding' for you.
If you do use og, then set type to: blog
Finally: fb:admins
or fb:app_id
- A comma-separated list of either the Facebook IDs of page administrators or a Facebook Platform application ID. At a minimum, include only your own Facebook ID.
So just put your own fbid in there. As a tip, you can easily get this by looking at the url of your profile photo on facebook.