I doubt that anyone on the forum could tell you, Carolgre, if a hearing aid could help you. You probably need to consult with an audiologist who would need to test your hearing.
My audiologist (after testing) told me that a hearing aid would not help my hearing because it was too far gone. I am essentially deaf in my acoustic neuroma ear, and, as she explained to me, amplification of sound in my ear from a hearing aid would not help me because I couldn't hear it anyway. Instead, she recommended a CROS system which picks up sounds on my bad ear side and sends them to a receiver in my good ear (which looks like a hearing aid). Now, I hear everything from my left side in my right ear.
But only your audiologist could tell you whether a hearing aid would help your hearing. It all depends on how bad your hearing is in your bad ear.
I hope that helps!