Not trying to detract from worthwhile discussion here ... but for a hack-first introduction, try this: <a href="https:&#x2F;&#x2F;github.com&#x2F;hangtwenty&#x2F;dive-into-machine-learning" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;hangtwenty&#x2F;dive-into-machine-learning</a>