Heres the most important part
#1 Set your drag so that your lure "slowly" falls to the ground when you let your line out.
#2 now when you cast it should be like a closed dace reel and no back lash.
#3 Just before the lure hits the water put your thumb lightly on the spool to slow the lure down then come to a complete stop.
Setting your spool tension knob is the most important part. Remember you want to set it so your lure will slowly fall to the ground when letting line out before cast.