Honestly speaking, Nik is in print media designing field from many years. He is a graduate in computer designing (etc.)
So why won't he able to make such designs....
If I or anyone take up courses to learn designing then even we can reach to his level at some day. My designs are not that much good and professional because I have self thought photoshop from the start. I never went to any designing courses nor do I have designing in my studies.
I'm in Industrial Electronics field where we have to deal with Transistors, Integrated Circuits, Micro Processor/Controller, etc. So the point is, designing is my hobby.
We should always try to learn out new things and yeah, practise them once we see it. This way it goes into our head. So do not discourage yourself by saying your noob. You are not pro, but you can become one.
There will be always a bigger fish in the water.