How to take advantage of your own original singing voice and keep it from deteriorating?

Hi so I'm a 16 year old girl and have dreams of becoming a pop-r&b singer. My natural voice is soulful, smooth and airy with some nasality and is in the range of a lower soprano-higher mezzo. I have previously struggled with identity issues and therefore used to put on many voices so bare in mind staying to myself is very important. I was wondering what I could do to keep my voice to the same quality it can truly be. Do I need to sing/listen to artists with simular voices and what could I do to ensure is always healthy?