In reply to Azheng6743:
Calisthenics just means to use bodyweight for resistance not external stuff like weights or bands etc, it's just exercise.
*What* calisthenics you do is important. I mean you could build up to doing one leg squats or one arm pushups but would they be the most valuable highest priority exercises for e.g. sport climbing...? probably not!
Rather than asking should you do calisthenics, maybe a better question if you could ask "what calisthenics programs are out there suitable for the goals of improving sport and trad climbing?"