The tutorial is currently available only in Spanish. The tutorial is currently being translated to English, but at a slow pace.

If you'd like to speed it up, send me an email just telling that you're interested in the project - a little cheer up always helps. Of course, if you understand spanish and are willing to write the English version you're welcome, just let me know in order to avoid duplicate work and I'll give you instructions to get the sources of the tutorial.