Basic levels of competency with a skill are 0. That's your average Joe Wageslave's skill with anything that they aren't trained to do. That includes driving, shooting, running, climbing, etc. If Joe Wageslave played baseball as a kid, he might have a point or two in Clubs and/or Athletics. But generally, unless it's part of Joe Wageslave's job or daily routine, it's going to be well below the 3 points that most people consider to be "standard." Just look at shadowrunners for instance. As PCs, the characters are expected to be better than your average Joe Wageslave. But there are never enough skill points to give you 3 in everything. So 0 is really the average, because most people are untrained at everything.
Computers for instance, handle damn near everything for you - why would Joe Wageslave need to know how to use it beyond turning it on and using a word processor and email? Having worked in IT support for a number of large companies, it's still amazing to me how many top-level folks haven't a clue about how their computer works. They know what button to press to turn it on, and how to do their job. Anything outside those confines (and sometimes within those confines) requires a call to IT.
So to me, an average user has a 0 in Computer. Maybe 1 or 2. But that's it, unless the person is using their computer all day every day. I know a number of programmers for instance that, despite them knowing a LOT about programming, have no idea how to utilize and manipulate the Windows registry. The skills just aren't the same. So I'd say even a professional programmer would be fortunate to have a Computer skill of 2. It's just not something most people need to know beyond the basics.