How to fix the shape of my teeth and smile? My two front teeth are extremely large compared with rest of my front teeth. (photo)

I have gotten braces so my teeth are already straight. But my smile still doesn't look pretty. I always feel insecure smiling because my smile looks like this. My lips are also asymmetrical, so when I smile, some parts of my teeth show more than others. Is there any procedure I could do to fix the bad appearance of my teeth and fix the asymmetry of my upper lip? (As a side note, I also have very fat lower cheeks and I was wondering what would be the best procedure to fix this)

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