Overall Transformers Documentation On Topic
https://huggingface.co/transformers/training.html
Fine Turning Based off of GPT2
https://towardsdatascience.com/train-a-gpt-2-transformer-to-write-harry-potter-books-edf8b2e3f3db
Training From Scratch with BERT
https://huggingface.co/blog/how-to-train
Colab Notebook - GPT2 for Custom Language Generation
https://colab.research.google.com/drive/1KfxYCah3Ku_xc7T-rYjPEevaczVFf03J
How to GPT2