I feel your pain Russ.
I've gone through plenty of enormous Juypter notebooks- only for some cryptic & unsolvable error right at the end
I'd recommend YOLOv5 for a relatively easy object detection https://github.com/ultralytics/yolov5
It is well documented and works well- I suggest using the Docker option
Ultralytics HUB https://ultralytics.com/hub is by the same people- although not the same as Roboflow, it makes training an OD model easy, and will export to a number of formats, including TFLite
You can train your model with a very simple COLAB notebook, or with a local agent