Looking to create a model for use on Android to determine symbol characteristics

Hi, I’m new to looking at AI, and I’ve been trying to work out if what I’m trying to achieve is possible with TensorFlow but I’m having trouble tracking down an appropriate tutorial.

The aim is to train a model that would be used in an Android app. It should be able to take images and recognise a particular symbol which consists of four arrows and a baseline, and determine the relative orientations of the arrows. The symbol may be rotated and will be produced by using a stamp to created an indent on a piece of wood.

I’ve seen models which identify people and map a stick figure against the person, so it seems like I would need to train something similar, and produce a series of vector lines matching the symbol. Can anyone point me to a tutorial that might help?