Hello, I think Yazura already took care of this but yes Kiera is not in the game yet. I believe I’m going to put a warning on any quest mentioning her to tell the player she doesn’t exist yet.
Aside from that Simeon’s house is locked unless he is inside it. As is the case for everyone. Simeon is in his house usually from around 11:00 AM to 5:30 PM I believe. If you can’t get in ever it’s a bug I’d be happy to look into but I haven’t heard of anyone saying that yet.