One solution is to reduce the scope of the problem -- you can train on a smaller less diverse dataset such as TinyStories which is a collection of 1 billion tokens of chatGPT generated children's stories. After about 40 hours, less than one weekend, you'll have a model which can generate mostly grammatical children's stories.
If you have a newer mac and/or an ultra chip you'll have more and faster GPU cores, and might be able to train on FineWeb or a similar, larger and more diverse dataset.
I try to explain the Chinchilla paper in the post, but your favourite AI should be able to explain it well, and has the benefit that you can ask follow-up questions.
I was interested in focusing on repeatability and using text sources anyone can legally obtain. It’s been fascinating, but after much experimentation it’s clear that working with more text and more diverse text would be extremely helpful.