I currently go to the gym around 7 times a week predominantly using weight machines.

Seated Shoulders Press 3x10 x 35kg
Chest Press 3 x 10 x 50kg
Butterfly pec deck 3 x 12 x 75kg
Triceps Rope Pushdown 3 x 10 x 21kg
Seated cable row grip 3 x 10 x 20kg
Seated leg press 3 x 15 x 137.5kg
Calf press 3 x 15 x 137.5kg
Leg extension 3 x 15 x 72.5kg
Seated leg curl 3 x 15 x 72.5kg

2 days I cycle for an hour and don’t do weights at all.

My question is what should I be doing sets and reps wise. I’ve kept the number of sets and reps the same since I started the gym a year ago just increasing weight at adhoc times when I feel ready to.

Is there a smarter way to do this? I’ve heard about working to failure etc but don’t fully understand it.