My neuropathy isn't as bad as yours and mainly in my feet (also chemo induced, colon cancer)- here is what helped me improve a bit.... (I tried gapapentin but it was not helpful).
- accupunture helped with the pain (but not numbness)
- barefoot shoes helped my feet wake up a bit and strengthen (they are not for everyone as they provide no structural support but helped me with being aware of balance)
- aquafit (regular classes) and water walking (with PT that included balance exercises in water and out)
- yoga (which includes balance exercises you can also do at home) ... I usually do yoga for ages 55+ and have tried some chair yoga as well

Try different things, stick with it for a reasonable time and then pick what works best for you