As long as you feel the burn yeah

8

As a rule of thumb that I use is if it’s an exercise that targets one muscle I’ll do 3x12-14 ie bicep curls, but if it starts to use more muscles(compound exercises) I do 4x8-10 ie bench, bar rows, etc

1

Don’t worry too much about the number of reps, just make sure you’re getting close to failure. Personally I’d start with two sets and progress to three when your gains slow down

1

depends. some stuff works better for others than you so maybe

1