How can I whiten my teeth safely after a root canal without causing sensitivity?

My teeth have become discolored, and I want a brighter smile without making existing dental problems worse. I am researching Tooth Whitening in NYC, but I have concerns about whether whitening is suitable for teeth that have undergone root canal treatment. I am also looking into Root Canal Treatments NY to better understand how treated teeth should be cared for. During my search, I came across Aesthetic & Implant Dental Arts and Dr. Joseph Maniscalco. I would appreciate advice from anyone who has faced similar concerns.