Besides the Hard Surface modeling example what Dolors74 has given, there are other ways to do this too:
The quickest (and already build-in way) to do this is with (Boolean) MODIFIERS:
Boolean modifiers, allow you to add and substract 3D volumes very efficiently (once mastered 😉
Take a look at these youtube playlists videos to quickly learn to drill any types of hole in any surface 🙂
– https://www.youtube.com/watch?v=Vf2M1bxZYk0
– https://www.youtube.com/watch?v=Ji-YlHdxmU0
– https://www.youtube.com/watch?v=JraE6e2k03c
>> Other type-of- modifiers tutorials: (since you are going to need them sooner or later)
– https://www.youtube.com/watch?v=HnmN3DZ6LbI
– https://www.youtube.com/watch?v=7ndd_qNYf3Y
– https://www.youtube.com/watch?v=PoAqFThRGCs&list=PLsW6W8PQ2HueTtqHolNmTTO6S6Mpie_dE
– https://www.youtube.com/watch?v=8gqCT4ScsDQ&list=PLE8021F9820C6FB9C
