Unless you plan to do professional fighting for a living, I wouldn't recommend it as if not done the right way, and with a lot of energy control you'll do more harm to your nervous system.
but if you are really set on it, before doing it I would master energy flow in the body, which would take a long time, years. and gain an extreme physique and muscle mind connection.
then slowly, very very slowly, over a decade gradually increase the routine, and make sure that every instance of taking a blow, or training to an area, you direct your energy to the place and reinforce that area with your vril. to the point where you are not taking damage.
also I would do an extreme aura of protections everyday in the range of 216. and do satanic healing every day.
if you are injuring yourself your doing it wrong.
I know a little because I've done something similar to my shins for fighting. my bones are hard but without the nerve damage.
in the end you will still might be damaging your nerves unless you have extreme control over your nervous system with chi/vril control. so focus on the foundations and master these
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Directing_Energy.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Yoga2.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Yogic_Breathing.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Circulating_Energy.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Foundation_Meditation.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Energy_Meditation.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Aura_Empowering_Meditation.html
https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Healing.html
it also goes without saying to advance your chakras to a certain level before starting.
that's about all the advice I can give you.
the goal is to strengthen the bones and bioelectric defense without damaging your nerves. and you can strengthen the bones to much, as stem cells and bone marrow to create plasma comes from bones.