It's great, perfect!

I spent the bulk of yesterday trying to pick a layout for my fastidious taste, but those all was faulty for me, and today I planned to learn how to build my own layout... and suddenly found this one at the very first post of this comunity! Unbelievable piece of luck!

Sorry for my lamerism (and my pure English), but how I can set it as my journal style? Is it need to test at first? I can participate at testing, if I can help.