When it comes to bodyweight exercise, it is all about changing leverage and the amount of your bodyweight you handle. This is the key to progress.
It’s not as simple as adding a plate or taking away one from the bar. And although you can certainly manipulate reps and sets you still need to understand the ideas of progression to really go far in any bodyweight exercise.
Sadly, few people really understand this concept.
In my story above I hinted at some of the ideas. But let me spell out this idea in simple to understand progressive exercises here.