Anecdote is not data, and it's only my individual anecdote, but it's my experience that breaking through into the industry to be incredibly hard. Since then I've made up for lost time and advanced faster than a college grad would expect (junior dev in a shitty agency to enterprise lead dev in about four years), and I attribute that to spending so incredibly long as essentially a junior dev freelancer and just being older.
So it can be done, certainly, but I strongly suspect there are several filters working against self-taught developer women making that transition into the industry, and one of them is definitely gender discrimination. And no, aside from sending out resumes with a man's name on them, I don't know how to fix it.