This always annoyed me, the obsession with being skinny. Being skinny doesn't mean you're healthy. I think we as humans would do better to encourage health and balance rather than superficial appearances.
Do it for. the stares the whispers that bikini the collarbone the hipbone the gap between your thighs the belly shirts the melted sweaters the light-as-a-feather feeling the cute pictures the sexy lingerie and most importantly YOURSELF
If you're just starting your journey to health and fitness, the first thing to do is just move! The rest will fall into place because you will learn what works for your body. Everyone is different and there are no quick fixes!