If by "not very complex or time consuming" you mean that initiation is a serious process that requires a great deal of mental and spiritual preparation, rituals, and study, then yeah, sure.
In actuality, Initiation is a very intense and extensive process. However, it is very different from tradition to tradition, and even differs slightly based on the individual and how they work their magic. It requires a certain amount of self-reflection and study to increase your own magical potential.
As a baseline, the rules have you roll an Arcana+Intuition Extended Test, which requires a number of hits equal to the grade you are trying to achieve and the interval is measured in months. From there, what you are doing during that time is up to you and your GM. But you are likely spending much of that time working specifically on that initiation.