You won't die by masturbating naturally.
You'll be fine if you only do it like once a week or 2 weeks but without porn!
If you'r ok by not having the full potential of benefits that come along with NoFap but yet still some good effects, then that's the way you can go, if this meets your goals ofc.
Just be aware that after your "fap" day, you might wanna fap the next day, be aware that you might strive for more the next day, this is where you have to stay disciplined and wait for 1 or 2 weeks.
I've been doing this kind of thing for the last 4 weeks, not because I wanted it, but after 2 2week-streak relapses, I feel like, the energy drop is really not that heavy anymore but yet something is missing but I feel greater than ever before.
Im doing a ton of stuff which might be the reason why I still have tons of energy and feeling great even tho I relapsed, so rather try it out yourself