Haha yeah people don't seem to bash the thread creator.
Now going back to utorrent, no there is no way to block people so that they cannot upload from you. That's simply the way torrents work. It's more of a 'sharing' thing rather than just downloading.
And I don't think torrents are the best thing for just downloading one or two songs. Torrents are used more or less for larger file downloading, that is, full albums, movies, games, applications. If you're looking to just download a song or two every now and then, I'd suggest downloading something like SoulSeek or DC++
If you do decide you still want to stick with torrents, there's a few public sites which you can search at:
www.mininova.org
www.thepiratebay.org
And as mentioned isohunt is another pretty good site. I'd suggest starting off with these sites if before moving on to private trackers.