Note: I was not able to use the site with Firefox, but had success with Chrome.
The most important instructions are in English as well as Japanese, and I had no trouble figuring it out, but if you need extra help there's a tutorial here.
With my first Chanrio I went the Kawaii route, then tried Mori with my second one:
As you can see, there weren't too many Mori options -- my look is still more Kawaii than Mori! Kawaii was my first love though, and I've been pondering lately how the two could be combined. It's a slight shame that there's no option for red hair, otherwise they'd look more like me, but if you're a kimono fan, there are many to choose from -- you'll be in heaven!
In other news, my Marie Kondo book arrived yesterday and I've started reading it. She's a very interesting person!