To think I will look completely different

[Purplerain77]

As I’m currently 12 stone overweight if I ever was to reach a healthy weight and do you think it’s possible to do natural

Yes I think you probably would look very different, and yes it is possible to do naturally:-)
I know somebody who lost that amount of weight naturally and she was pretty before, and she is still pretty now, but what’s changed massively is her confidence and vivaciousness. So she looks different because of her weight but also the way she moves and her behaviours and overall attitude.
Go for it OP, it is absolutely possible, the key is consistency. It might take you years, but you can get there - 100%.