What you have to understand is that the "risk" of rooting varies GREATLY amongst different devices.
Phones that are heavily locked down and require the hacking of exploits to gain root and/or unlock the bootloader can be quite risky, both in the ability to wind up with a bricked device and voiding your warranty.
Nexus phones and tablets, however, are a MUCH different story. The bootloaders are not locked*, so getting your tablet to a state where it can be rooted is as simple as passing along some commands. Sure, perhaps the process isn't exactly intuitive or user friendly, but it's really not supposed to be either. Based on the info you've already provided, OP, I can't image you'll have any trouble following the procedures to unlock your device and get it rooted.
The other fantastic part of owning a Nexus is that there are
factory images available that you can flash at any time .... and come in very handy should you ever have an issue that causes your device to be bricked. In most cases, all you need to be able to do is get to the bootloader and flash the factory image to get your device back into working shape.
Am I trying to talk you into doing something you're comfortable with? No.
Am I willing to take any responsibility should you decide to root your device? No.
Do I recommend rooting your device if you think you're comfortable with doing so? Absolutely.
*[EDIT: I should have said that bootloader is user-unlockable, it does shipped in a locked state]