Should I look at the wheelbase?

If you are a beginner, you don't need to pay attention to this at all.  Even people who skate for a very long time usually don't even look at this.  But it can still be useful to have some knowledge about it. Wheelbase says something about the distance of the trucks, and that affects the turning circle. A shorter wheelbase makes turns sharper. A larger wheelbase makes your ride smoother.