That really, really depends on your definition of "doesn't know a lot." If you're pretty capable with a screwdriver and are willing to ask some questions on a forum, we can teach anyone how to put a PC together without issue. If you don't know the difference between a power supply or a processor (I met someone like this yesterday who was trying to build a PC), you might be in for a spit of trouble.

If you had to genuinely rate your familiarity and/or expertise with a computer's innards, on a scale of 1-10, what would you say?