This is a good start.

What type of artist are you? Do you have contact with pigments, solvents? Some of them are toxins to nerves.

Also I'd like to ask about that "bad heart"... does this mean you are on statins for cholesterol? These drugs damage nerves in some people.

This is good that some initial supplements are helping you. Don't forget about magnesium in some form...either soaking in epsom salts, taking a quality supplement or using a topical lotion like Morton's new Epsom lotion.

Yoga is good. It teaches helpful breathing which can lessen nerve symptoms due to poor breathing habits. Just don't strain anything with some of the more difficult moves.

There are things that help PN for most people. But a "cure" is not realistic for many. Stopping progression and lessening discomfort is a serious goal, everyone here can perhaps attain.

The exception is the progressive hereditary forms of PN called CMT (Charcot Marie Tooth) disease. Do any of your family relatives have PN, and it is progressing?