Things to possibly go over:
What makes yuri better than YAOI (and/or straight)
Why is it called yuri instead of another female name, like Eiko, or something
Common traits/themes/stereotypes in yuri
Is it really yuri if there's a guy there
Non-hentai characters named Yuri that would be great in a yuri
Non-hentai yuri
The fun thing about panels is that you can do them however you want. If you want to mimic a panel, it helps to attend one. If you want to mirror a YAOI panel, I'd recommend searching for YouTube videos of such panels; I'm sure that they're available. You may also want to look for panels that are centered towards another genre, or specific franchise, just for the sake of a panel blueprint.