Non IT education and GC process

Hi,

I’m on H1B visa and working as a contractor.My employer ( a small consulting company)will start my GC process soon.I’m a Commerce graduate having 9 yrs of IT exp(2+yrs incl.in US).How much time it might take for GC process considering my educational background (though I have some valid IT certifications)and will there be any RFE or questions due to my non -IT education and the work am doing?Would like to know if anybody has similar experiences…