Here's some tutorials on Houdini if you ever get the spare time. Houdini tutorials is pretty hard to find for free, I find. Some basics some a little bit more intermediate.
Other than that, I think mostly workshops and schools teach it. cmivfx.com has some really great tutorials, but it's a paid type.
This as well, but I'm not sure how much use you'd get out of it since they used their own Py tools. There are some threads on exporting here if you just search Houdini. A bit of it is more advanced than my current knowledge, so hopefully it comes of some help to you.