Learning Gaelic

I've decided to learn Scottish (Gaelic) for no reason at all.  To start, I signed up for some online pen pal thing and then went to this website...http://www.learngaelic.net/index.jsp. So far I learned how to say a basic greeting and when a word is spelled out "tha" it's probably pronounced "ha".  I was a little surprised that it's not teaching the the alphabet first but I suppose if you think about it, when a child learns to talk it doesn't learn letters first.