Hell you´re saying you have been painting for just two month - this looks awesome, very good details on the characters and very solid standard on the rank and file. There is actually very little I can give you as advice, as it all looks very good already. Maybe you could use slightly different skin tones on the orks then on the goblins, they may stand out more, and the fluff usually sais orks are darker.
It is only personal preference, but I loathe the bright green base edge, I´d rather do it brown, I can´t explain it but I have very negative association with this color. but that´s just me, great work - i´ll be following it closely.
Micha