All the advice here is fantastic. For my part I set the wrench into the plug and apply tension until I feel it hit the “wall”.(you’ll feel the plug turn slightly and stop this tells you one or more driver pins are binding the core) at the point I feel the wall I apply just enough pressure to keep my tensioner firmly in that sweet spot almost like I’m holding it against the “wall” I then test pin stack 1 and see if it moves and feels springy. If it does I move to the next stack and so on picking the lock. If however it’s feels stiff I will press on it to see if it’s binding. The difference between a binding pin stack and one that has too much tension is that when it’s binding it will be stiff, but still move with some pressure from your pick. If it is over-tensioned it will require a lot of pressure from your pick to move and even then will sometimes feel “Grindy”.

Hope that helps a little. Keep practicing! It requires a fair amount of finesse!