You can call yourself a tiler with no training at all, that's the problem with the trade, it isn't regulated enough really, and some good tilers on this forum haven't had any training other than following an existing tiler. Which is probably the best way to do it other than college etc.
But if you do a short course to teach you the basics, get to know some suppliers and the tools etc while you're there, you'd have had more training than a lot of "tilers" out there!
We have a college coming on board soon in the midlands if that's any help?