u/Abject_Mix5458

bought my air pump with gauge 2 weeks ago and I'm going slowly slowly, my first week was one day on, one off with 1 set soft/semi erect of 3 min and 2 sets hard of 4 min (using 100 mmhg). my second week was daily and the same structure (110 mmhg). my questions are:

When should I add sets of 5 min instead of 4?
When should I add an extra set to make it 3 hard sets instead of 2?
When Should I start adding more pressure to reach the range mentioned by hink?