Reversing a female with a silver solution so she produces pollen is how feminized seed gets made, and you can do it starting from a plant you selected out of a regular pack. It gives you female only seed of a clone you trust, which solves the space problem for future runs. The process, including spray timing and which plants make poor candidates, is documented at https://breederregularseeds.com with the usual safety warnings about handling the solution. It is not beginner territory, but it is less mysterious than it sounds.