Go to kaggle.com. Sign-up / Sign-in as necessary. Click the "code" tab in the left hand navigation bar. On the ensuing page, select the "beginner" filter, and then change the sort to "by most votes".
But browse around, there are several that look pretty comprehensive and well documented at a first glance.
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Also, if your friend wants a book to go along with their learning, look at "Hands On Machine Learning" by Geron. It's a great book anyway, AND the Github repo includes a whole series of Jupyter notebooks to go along with the book, including a handy "Open in Colab" link that will launch the notebooks directly in Colab.
Go to kaggle.com. Sign-up / Sign-in as necessary. Click the "code" tab in the left hand navigation bar. On the ensuing page, select the "beginner" filter, and then change the sort to "by most votes".
https://www.kaggle.com/code?sortBy=voteCount&tagIds=13102
The top few results there will probably be good for your friend.
This Titanic one looks pretty good, but note that it uses R, which might be off-putting to some people.
https://www.kaggle.com/code/mrisdal/exploring-survival-on-th...
But browse around, there are several that look pretty comprehensive and well documented at a first glance.
---
Also, if your friend wants a book to go along with their learning, look at "Hands On Machine Learning" by Geron. It's a great book anyway, AND the Github repo includes a whole series of Jupyter notebooks to go along with the book, including a handy "Open in Colab" link that will launch the notebooks directly in Colab.
See:
https://github.com/ageron/handson-ml3
https://www.oreilly.com/library/view/hands-on-machine-learni...