You can substitute vegetable glycerine in for glycerol, same concentration. Skip the water.
Anon made a huge batch to sell
The overall goal is that you get the alcohol v/v above 60% and you have some kind of moisturizer or emollient to counter the leeching/drying action of the alcohol.
Don't bother making it unless you have a hydrometer to test it though
better sauce is found here
https://www.who.int/gpsc/5may/Guide_to_Local_Production.pdf