UTAU is somewhat tricky to install -- I wasn't able to do it without finding various wiki pages and following the often convoluted directions. The installer is indeed in Japanese and several other things had to be tweaked to get it to work.
And it was even harder to uninstall -- in fact it left one of those registry artifacts that I cannot locate, and I am stuck with that until I get around to using a registry cleaner. Not a big deal as it doesn't cause any errors or anything, it's just annoying.
I actually went in the Vocaloid direction, since I couldn't find any UTAU voice banks that served my purposes. I have since then heard some that are pretty good, but I prefer my possibilities with the Kagamine twins and the English Vocaloids Tonio and Prima.
I guess you could say I'm doing Christian music, but it's so far only classical stuff, since that's all I know. I also have past experience in sequencing orchestral music using Finale, so adding Vocaloid vocals is a very natural extension.
I've been writing about what I've been learning in my deviantArt journal, which is not necessarily the most appropriate place. I do eventually hope to branch out into something in a more popular vein, but until I'm familiar enough with the software, I'd rather stick with what I know.
UTAU is nice because it's free.
Don't give up just yet as installation roadblocks seem common with this software.