Slow your horses, trigger. PID is a control algorithm that utilizes the understanding of Calculus’s integral and derivatives, but trust me this is easier than it appears. I will garuntee you though, that if you learn PID then you will have an easier time than your peers learning Calculus if you wish to take it in High School (Although I did drop out of Calculus because my teacher did some relatively abusive stuff to me where my counselor made me leave the class despite it being past the drop deadline).
Trust me, when I do say it though. PID is easier than it appears, and I have a tutorial (that appears to be proven as helpful) explaining how to code it.