How can i make lower half look healthy or hair cut the answer?

Hello everyone and to hair specialists ,
I have long knee-length hair, never chemically treated and matter of fact I never went to hair salon. My hair is mostly straight. In picture it looks wavy because it was braided. Also my hair are not washed in the picture and I do put oil in my strands and hence the black shine :)

As the pictures show my lower half looks really thin, yes maybe it was the hair fall. But I really hope i could flaunt my hair too. While length is impressive, lower thinness bothers me.

What is the answer to the problem? Hair care tips? Hair oil changes maybe? Or a cut? I love my hair length though and dont wanna compromise it.