Is it easy? Yes.
.......and even possible! ;)
Easiest way to lower the backend is to change pull rods. Devol makes a set. They'll only drop it about 3/8". Koubalinks make several styles depending what you wanna do. They drop as much as 2.25" depending on link.
http://www.koubalink.com/kdxspring.html
Internal workings of the shock can also be changed to lower the bike. That's not nearly as cheap or easily undone as changing the pull rods.
Keep in mind that comfortably touching the ground isn't likely a good thing. A rider should have feet on the pegs most all the time. If the ground is easily reachable..and a new rider KNOWS that, it will likely lead to 'improper touching'!! ...and we can't have THAT! ;)
...besides the poor techniqe that would become engrained there's the busted legs and smushed foots that may result.
There's a balance 'tween the two. Surely falling over everytime you come to a stop, or not being able to kickstart the thing isn't good. But neither is having the bike low enough to make it feel 'safe' for a new rider.
re: too much power?
Nope. It can be jetted/modified from mild to wild.
Oh, 'does it adversely effect the handling'?
It can. You have to balance the front to back. The koubalink site 'splains that purty good.
Cheers!