Ask HN: A good project for getting into Language Modelling?

Hi HN, I am looking for a career change and have a week long vacation planned soon. My experience is in software engineering, what do you think would be a good project to do over the week to get into Language Modelling? Some ideas I had was:

1. Build a repo of Transformers and all it's variants and try to benchmark the efficiency of each variant.

2. Train a small transformer on a small dataset that I can extract from the internet.

3. Try to reproduce a small scale version of RLHF (maybe not realistic at even a small scale)

I'm biased towards projects that people find useful beyond me just learning more about the field and assume I have access to like a few hundred dollars of AWS GPU compute. Thanks a lot for your help