My girls are just as silly... Just be patient, they will figure it out.
You may want to entice them with a feeder and water in the run to help let them know it's ok. Maybe close the door to the coop for a couple of hours and see if that helps. Your coop/run is beautiful.
They will find the courage to check things out.
When I put my girls in the run/coop and night came, I found them all huddle in the chicken door opening and would not go into the coop. I had to physically put them on the roost in the coop the first night.
The next night, DH had run the electricity out to the coop. So I turned it on and the girls were still huddled at the chicken door, but managed find their way in. By the third night, the lights came on and the girls went in like "monkey-see, monkey-do" and have every night since.
When it came to treats, my girls were little girly-girls. Everything scared the pellets out of them! Again, with time, everything came to them and now they gobble up anything I bring to them. A few are still a bit silly, but everyone gets a taste.
I put my three week olds out in the coop/run this weekend (our weather will allow it) and they were so happy. It could be the difference in breeds...
I wish you luck.