Hi Dipam,
Which part(s) of lesson 3 are you struggling with? It’s going to be difficult for people here to help, without knowing more details/descriptions of what you have difficulties with…
The dataset you described actually sounds very similar to the dataset used in lesson 3 (regression of point coordinate on face). I think it would be reasonably straightforward to modify the lesson 3 Jupyter notebook to work with your dataset. Perhaps you can start with just one thing from your dataset (maybe the nose coord?) so that it’s completely similar to the lesson 3 data. When you get that working, I’d imagine you’ll be familiar enough with the notebook and workflow to expand to all the points in your dataset.
Any question/errors you have, please ask here, with relevant details as described in this thread.
Yijin