I would recommend [1].

It is challenging for a beginner, at the same time I remember this course (at least many years ago) having an outstanding community. No question without answer spirit.

They have detailed instructions on how to install Anaconda.

Once done with this training your young relative won't have any issue registering and creating an account with any given AI provider and making API calls.

deeplearning.ai happens to have course very beginner friendly. But in My opinion a person should focus on having the aforementioned course (or CS50 [Also on edx]) under its belt.

[1] https://www.edx.org/learn/computer-science/massachusetts-ins...