The goal of this physics school is to offer master and Ph.D. students, a coherent introduction to the subject of quantum gravity in low energy quantum systems from both theoretical and experimental perspectives. While the focus of the first training school was on the high-energy aspects (WG1, WG2) of the BridgeQG network, the focus of this training school will be on the low-energy aspects (WG3, WG4). A third school will cover the combination of the two branches (WG5). The school consists of four main lectures, which are accompanied by hands on exercise classes. In addition there will be an introductory talk on Quantum gravity phenomenology, an evening talk and a concluding talk.