Putting blocks in areas is a rather simple task, but if your users aren't experienced computer users, it might be even too easy. What if they accidentally delete or modify the autonav, the navigation block? It would break the site very quickly.

You can enable the advanced permission mode, which allows you to specify permission on blocks and areas. However, enabling this mode can give you too much power and makes managing the site more complicated. While this shouldn't be a problem once you're more familiar with concrete5, there's another way you might want to check out—put block in your templates!