Did you like the effect of the tincture (except for the burn)? If so, sounds like you did everything correctly. Even if you used vodka at 80 proof or 40%, (and not making as good a product) it would probably burn. It needs to be mixed with something to reduce the ethanol concentration. Favorites are glycerin which can be mixed and stored, or a high fat food such as nutella, peanut butter, bacon grease or just put it on a burger etc. Glycerin will give the fastest onset and can usually be taken sl.