google images '3d printing boards' find your board, then find the schematic/wireing diagram.
then look up which ever firmware your using, probably 'marlin'
take yu time on the read up..
X axis is the horizontal bars that the cariage goes left and right on.
Y axis is the bed, travels towrds you and away from you
Z axis is the screw bars that go up and down
E0 is narmaly yur exstruder.
next come you tube, theres loads for prusa's.
im a newb too btw.