@toni1132 Hi Tonni, Welcom to our group - as you already can see, there is a lot of information here, and a lot of links to other resources. I hope you find some answers that help you deal with your situation. Most of us here are trying to figure out how best to live with our diagnosis and still manage to have a life beyond it - we take varying levels of precautions depending on our level of illness and our circumstances.
I don't know about copper actually killing bacteria - at least mycobacteria (NTM). I believe studies show is that copper does not support the development of biofilm, where the NTM tend to colonize, the way plastic pipe does, but not it actually kills the NTM. That said, your cleaning and drying precautions, together with the copper itself, should help keep down the NTM growth to reduce your exposure.
Since NTM is EVERYWHERE, you cannot completely avoid it, simply minimize your exposure with reasonable precautions. For me that means no hot tubs, no long steamy showers, no digging in the dirt in my Texas yard that I share with chickens and wild birds (and avoiding the dust from it by keeping it covered with native plants) - all sources of aerosolized bacteria, which is the big risk. But I still travel, eat out, socialize (but not with sick people)...
Do you know the composition of the rest of the plumbing at your residence, whether it is copper, plastic or iron? Have you set your water heater to at least 140F to help prevent NTM from colonizing there?
Sue

@toni1132 Hi Toni, I soak my showerhead in a plastic container of neat vinegar for at least an hour then screw it back on. The American Thoracic Society suggests using neat bleach. But mycobacteria are resistant to bleach so I don't do that.
The research I've seen shows that mycobacteria grow especially well in showerheads -- much better than in taps etc. (Showerheads can have up to 4,000 times the number of mycobacteria than happens in prdinary running tap water in the same house!). So apart from drinking long-boiled water, very frequent cleaning of our showerheads is the best thing we can do. So I use a cheaper showerhead and replace the whole thing twice a year -- the vinegar causes some rusting around the shower holes.
P.S. Copper showerheads might help to control some bacteria but unfortunately won't help much to kill mycobacteria. The main thing is taking the shower head off and soaking it all in neat vinegar frequently.
Good luck, Annie