Help for Birdclef-2023 with fastai

Continuing the discussion from A Guide to Converting Audio to Images:

Hi I am a newbie with DeepLearning and I tried as Jeremy suggested to experiment while doing Part1 of the course, I picked the birdclef-2023 Kaggle competition to try out fastai and computer-vision, I found a link where some other people on the forum where experimenting with the same dataset, I am stuck when submitting my results but I am not sure if the problem I have is more related at how I am training my classifier.
On the other discussion you can find a link to my nbs, if anyone could give a look and suggest any way forward, it would be much appreciated.