I am curious about root canal treatment and teeth whitening.

I had severe cavities, so I received treatment for cavities on my front teeth and molars, among other areas, and I also had fillings with resin. I also underwent root canal treatment about three times.
If I have a lot of dental treatment experience like this, will I not be able to get teeth whitening? Also, can I not undergo cavity treatment or root canal treatment after teeth whitening? And since my nerves are not in good condition, I think the whitening treatment's effectiveness will also decrease. How many sessions should I undergo to see good results?

I'm stressed because of my yellow teeth and want teeth whitening, but I am very worried about these issues.