Re - First time portrait using natural light
I just saw your post and had a look now. There are two things that I have noticed.
First, I think the background is a bit cluttered, with the picture frames looking too busy.
The second point is that I don't think the focus is quite right. The shots just look a bit soft. That may have been your intention, so pardon my comment if that is the case, but I think her eyes need to be little sharper.
For my taste, I think the first shot is too closely cropped, but I am a non cropper!
Overall I like the shots, but they don't quite pop for me.