I recently worked on the same setup as yours (custom hef, yolov5 & v8) and wrote this tutorial: Custom dataset with Hailo AI Hat, Yolo, Raspberry PI 5, and Docker | by Luiz doleron | Luiz d'Oleron | Apr, 2025 | Towards AI
and this tutorial: Deploying a custom YOLOv8 model on Raspberry Pi 5 with Hailo AI Hat+