Pretty cool! Doing things with photo reference is hard because nothing in reality is in 1 point perspective, this is almost a simplification of perspective. Don't have a lot to add in terms of constructive feedback, other than some things not feeling like the scale is accurate, like the tv stand in the right image, compared to the table in the distance. Still, great work, keep it up! Also, great sink location!

Hey! I found getting the proportions right tricky too, but i think did a good job with the proportions for this exercise! I think practising both ways would be beneficial but drawing the limbs with the rest of the body would be more so because the rhythms of the arms and legs move into the torso for example the connection between the pecs with the deltoids. For the limbs, I think you have done a good job for sketch #3. For sketch #4 I think you could add tapered strokes to the forearms as the lines are quite parallel instead of getting thinner towards the wrist. Also, for that pose, in the reference she has most of her weight bearing down on her left leg, your sketch shows her torso to be moving in the opposite direction, making it look like she hasn’t got that weight traveling down that leg. I think using center lines and a line for the angle of the shoulders can help when drawing the torso to support the pose. I hope this is helpful! :)