Time estimate from I-130 to EAD inside the USA

[JLTFrugal]

I'm 28 years old and my mother is about to receive her green card. I intend to apply for a green card through her, while visiting in the US. That is, I wish to apply for an adjustment of status in the F2B preference category. I know the green card itself takes many years to happen, but can someone tell me how soon after filing the I-130 I can apply for (and get) the Employment Authorization Document? Even a rough estimate would be appreciated.

Thanks