Program?/approach

I’m sure this has been asked before so I apologize for if it’s a repeat.

What sort of program is recommended for calisthenics. I prefer to do it at home. I have a pull up bar. So far I have been doing triplex sets of pullup, then push up, then assisted squat with book, then maybe a plank added. I do it a few rounds.

I’m sure there are many ways to go about it. But is there something I can learn to do it properly or more targeted and efficient?