so I've been trying out the mastery for every single exercise starting PE1 to gauge my current level and although that I do have a mastery over a lot of the exercises, I struggle a LOT while attempting mastery that I do not feel confident that I actually "mastered" those exercises.
So my question is, should I keep attempting to move forward till I find the exercise that I fail to gain a mastery, or should I stick to the lower level exercises until they become easier?