How to add images to training set


I am playing with stanford car data set from kaggle,

!kaggle datasets download -d jutrera/stanford-car-dataset-by-classes-folder -p {kpath}

Most of these cars here are older model, so when I tried to classify a chevy volt with this model, it was misclassified.

How can I add this single image to training set and recreate a new model. My goal is to create a feedback loop in the app, so as and when images are not classified properly, retrain the model with this new image.