This is a smaller, more to the point post.
I went into freemode when I started and tried out how all the joints work, then played against uke, which is actually quite helpful, as some noobs just learn how to do and opener and thats it. Then I went to beginner multiplayer servers, tried all modes, then worked my way up. When you get to about intermediate servers then you'll stand a chance in a tourney, and tourneys are usually the best, because the best players normally go there.