How to dissolve calcium sulfate fast?
Unfortunately calcium sulphate, gypsum, $\ce{CaSO4}$, is depressingly stable and nothing non-deadly will dissolve it.

The other posts you have seen are about calcium carbonate, chalk/limestone/marble, $\ce{CaCO3}$, which acids will dissolve, although people do not in practice use that fact to make holes in it. One of the first difficulties would be to get the application of a liquid focused enough to make a hole-shaped hole.

If you ever did want to dissolve marble, I'd use hydrochloric acid, $\ce{HCl}$, because calcium chloride is nice and soluble. But check beforehand that it doesn't dissolve the gloves you intend to use.