Easy to assemble?
Very easy to assemble and disassemble.
Is the monitor shelf strong and sturdy enough to hold a desktop pc?
It is quite sturdy. I use that shelf to display my collectibles, which is a good 10-15 pounds worth of items. It's also used as a springboard for my cats to access the window. This desk was well manufactured and is quite sturdy all around.
How much weight can the shelf hold? I have two 24" monitors on a center stand that is 10" deep (the stand is 10" deep on the base).
I can’t tell you the exact weight limit but I wouldn’t worry with the equipment you mentioned. I’ve had this desk for about 6 months and have no problem keeping my full size pc, a 24” monitor, a 32” tv, and two game systems all on it with no issues. I have no worries about the stability of the desk at all. Hope this helps.
Can the monitor shelf be placed on whichever side of the desk piece?
It can be placed on either side. The instructions clearly state it and give steps for either side.
Is the shorter side interchangeable?
Yes! The shorter side is interchangeable, you can make the shorter side either on the left or on the right.
What tools are required to assemble this deal? Can it be assembled by one person?
yes it is quite easy, I assembled myself ( i am a women :) with my teenage son), so one just needs to hold it, the tools come with it, like at Ikea