It depends how many BW chins / dips you can do (i.e. how strong you are), and also how many times per week you're doing these lifts.
Just doing 3 sets of AMRAP (as many reps as possible) with bodyweight, going close to failure but not actually failing mid-rep, works well for beginners.
Alternatively, you could do 3-6 sets at bodyweight below failure over the course of the workout, the goal being to accumulate volume (e.g. if you can do 12 good pullups, you could do 6 sets of 6-8 reps). Or add weight and try to do sets across -- e.g. add 10lbs and do 3x5 or 5x5, then add 5 lbs next workout and keep reps constant. Or ramp up to a top all out weighted set -- e.g. BWx6, +25x6, +45x6, +60xAMAP.
You can also cycle through these various approaches over the course of multiple workouts.