Working student job + additional mini-job despite private health insurance through parents, is that possible?

Hello, I currently have a working student job and would like to start a mini-job at the same time. I am a student, was exempt from statutory health insurance at the beginning of my studies and am currently privately insured through my parents with Debeka. I am aware that the 20-hour limit during the lecture period is important for working students and that the working hours from both jobs are probably added together. I once read that if the St