Please recommend a dental clinic that specializes in teeth whitening.

My teeth are somewhat yellow, so I've become interested in teeth whitening lately...

So I need to search the internet and do that, but I'm too lazy, so I just think about it but can't put it into practice.

It makes me nervous every time I smile... and also when I talk...ㅠㅠ
I recently managed to get toothpaste that is said to be good for teeth whitening...

I also want to try teeth whitening.

It seems I need to get treatment for one of my right molars because it causes pain when I chew.

Please recommend a dental clinic near Imdong, Yudong, or Sochon-dong in Gwangju that specializes in teeth whitening and prosthetic treatments.