Add multiple entity relationships in one field

I watched Itangalo's videos about this module but still came away confused: this looks like a lot of work to implement on a website. Take for instance, I have two content types: Person and Article. An article can contain multiple people, so I should have a field which will easily let me indicate who was mentioned in the article. Ideally, I'm thinking this would be an autocomplete widget. Multiple people could be mentioned in each article.

From the video tutorials, it looks like you have to first go to an article, then select in your block, that this is an entity field. Then you have to go to each person page and manually insert a relationship there. This would quickly eat up a lot of time!

So, is there a way that when you're creating your article, you can just list who is mentioned in a field and the relationship will be set that way?

Ultimately, I'd like to do some genealogy type relationships, so I hope this module can provide that flexibility!