Yes, it is a beautiful home! I would immediately get some temporary plastic decals of any kind & put them on the windows until they understand they are windows. You can't have them crashing into the window, that's too dangerous. I can see the confusion with so many things hanging from the ceiling, it's quite busy to navigate in a new place. Can you limit their flying to 1 room at a time instead of the whole open concept. They sell cheap netting/ magnetic curtains on Amazon..again Temporarily. allowing them to practice flying in just 1 room at a time. Also, just a thought, but I don't see many places for them to safely & easily land. Can you put some perches or tree stand, or table top tree stands around for them?
I have coiled rope perches hanging on hooks on my ceilings in their room & in between windows, near doorways so they can land on them when they are flying.
It is an absolutely beautiful home, but it doesn't look very bird friendly in my opinion. My home with my 3 looks like a giant bird cage! I have attached whatever pics I can find on my phone wheile I am here at work, but it's just so you can see. I have wooden buckets ( chewed up some) on my counter for them to perch & land on. A swirly coil between the kitchen cabinets above the sink & in front of the window. Various things hanging in my living room ( excuse my husband & his family posing for Dinner). The first pic is the skylight in our kitchen.