you need to overload in order to grow

and for bone density to increase, that's hell even harder effort

bodyweight squats is only good for absolute beginner

trust me one year ago my gym buddy was just squatting empty bar, he is your height and your weight too

now he's been able to squat 80kg with perfect form, in just a year

put extra emphasize on your form if your worry about injury, even if the progress is slow, as long as you're progressing its better than non

weight lifting also can increase bone density