A few questions about helping a young woman from Gaza - seeking guidance

As-salamu alaykum, We are preparing to give a small apartment to a young woman who was evacuated from Gaza some time ago. I want to make sure we do this respectfully and don’t make her feel uneasy, so I have a few questions. To be honest, I’ve known Muslims my whole life but never someone from Gaza specifically, and I’ve heard there are certain boundaries she might observe. For example, I’ve been told an unmarried woman may avoid going into the home of an unrelated man. Since I’ll be her landlord, does that mean I shouldn’t enter her flat either? She’s alone, and our plan was for me to help with furnishing the place - is that okay, or should I suggest alternatives and ask her first? We have a large house and my mother’s flat is above the one we’ll give her. If my mother invites her for lunch, would it be appropriate for me to join? I don’t want to cause any awkwardness. This might sound overly cautious, but she clearly went through a lot and is religious, so we want to make sure she’s comfortable. My girlfriend thinks I’m overthinking it, but I’d rather ask than risk making a mistake. I’m looking for simple, practical advice on how to approach this with her - how to ask about boundaries, what offers of help are suitable, and any common courtesies I should keep in mind. JazakAllah khair for any guidance.