keep up the reading, Arimidex - anastrozole - isnt for PCT - post cycle therapy - it's for extrogen control.
for your first cycle i dont think the goal of gain or cut should come into play much, a first cycle should always be about gaining, you respond best and your first cycle and you want to use that to bulk up. So eat a lot bro.
test and Dianabol - methandrostenolone - as said above