Does anyone know how to mix calisthenics and powerlifting? I am struggling with creating a plan that works but couldn't figure it out. I would be grateful if any kind of help or suggestions

I have few things bugging me. I dont have a very progress in skills, may achieve l sit and handstand this month. I had doubts on dips, when I go down, my body flexibility let's me go down more than the minimum condition of arm being parallel to ground, and goes more deeper to shoulder level. It wasn't always like this , I'm stuck at 8-10 reps. My dips progression is good considering the stretch I get but no progress in reps. Should I do any changes or let it go how it's going? And I have access to my clg gym which has few equipments to suffice, so i do pushups pull leg rest push pull session with mixture of gym and calisthenics exercise. I find it hard to add core exercises; wrist, grip, pinch strength exercises. And flexibility, any idea on how to shape my workout plan efficienctly

Hi, I'm trying to learn pullups, and i was able to increase it to 4 before hitting a plateau. I tried weighted to improve the rep range. There wasn't a drastic change but as of now, I can do 6 body weight pull-ups, and 3 reps with 5kg plate added. One of the senior gym told me not to do weighted till i hit 10 reps with bodyweight. Should I continue what i am doing or listen to his advice?