During ski testing, we typically take the gondola, which is downhill of the greenest of greens at Snowbasin from where the tents are. I have gotten to the bottom and gotten on the beginner chair back to the tents just once on a pair of skis that I could tell were going to take ME for a wild ride in the conditions that day. I've definitely taken some runs from the top (it's a long way down) on terrain I am very familiar with and done some survival skiing. Sometimes due to tunes, sometimes due to a ski just being more than I can handle. It's a really good way to sort the wheat from the chafe for me.
There's nothing wrong with skiing a green on skis you aren't familiar with. It's a great way to get a feel for the skis. Enjoy your new Renouns!