Has anyone tried teeth whitening?

I've been 고민ing for a few years now because I've heard reviews saying that my teeth are extremely sensitive, and others say it doesn't work, so I haven't been able to decide. But lately, I'm wondering how things are now~ I also don't know how much it costs~ There are many home care products available, and I'm curious if they are effective too~ I want to have white teeth ㅜㅜ