As with almost everything in Blender there are a number of ways to get the same result. However, each comes with its own set of potential issues. For instance, you could use a boolean operation to cut out the holes (probably what I would have tried first) but there’s likely to be a good bit of clean up involved afterwards so it might just be a trade off.
Like Omar mentioned, keep watching the courses and you’ll see a variety of methods. Over time you’ll find methods that click with your personal workflow.
