Just enough about the Event Loop, Promises and async/await to help you prepare for /api-calls.
There is sooo much you can learn about how Promises and Asynchronous Programming work in JavaScript and the Web. What matters for you now is getting ready to fetch data from APIs and render it in your applications.
You won't find too many exercises in the final sections of /isolate. You can move on to /api-calls when you're ready to practice.