Considering how much information is available on the topic of creating an airgapped setup, both on Bitcointalk and outside of it, you really don't need any particular knowledge to be able to follow a step-by-step guide. Just read the recommendations and apply them. The biggest problem isn't in creating an airgapped system. The biggest problem is that most people don't have spare computers or laptops laying around and not being used that they can use exclusively for their cold storage. Or they are not willing to invest in one only for that purpose.