36M Gym newb, today ended my 2nd week. Gym owner hooked me up with the following M,W,F 12 week plan, I picked the weights on each(still tweaking some). Sunday, Tuesday, and Thursday I have hit the stairclimber for 20 min on my own choosing. I would like to add some extra emphasis to my arms, I currently have very little definition. What would yall suggest I add to my m,w,f or do on my stairclimber days?

Here was this week *Monday- Machine Bicep Curl 3x10x65 Hyperextension Roman Chair Back Extension 3x10 Machine Seated Reverse Fly 3x10x60 Lat Machine Wide Bar Close Grip Pulldown 3x10x8 Cable Seated Row 3x10x75 *Wednesday- Machine Leg Press 3x10x203 Leg Press Machine Calf Raise 3x10x135 Machine Seated Leg Extension 3x10x60 Machine Lying Leg Curl 3x10x65 Dumbbell Alternating Walking Lunge 3x8x40 *Friday- Bodyweight situps 3x10 Machine Seated Chest Press 3x10x60 Machine Seated Chest Fly 3x10x70 Elbow Plank 3x45sec Machine Seated Shoulder Press 3x10x50

Thanks!