Huh, odd that the burned disks aren't working for you. Are you downloading Ubuntu from the official site? If all else fails, you can request an official CD (free of charge, I believe, but they do encourage a donation) from here: https://shipit.ubuntu.com/
Also, what are the specs on your computer? Newer versions are a bit more demanding than older versions (Ubuntu 8, 7 and earlier will run on very low spec computers, but 9 and 10 require something a bit more modern)
Once you get to the point of installation, it's really no more difficult than Windows. Current versions of Ubuntu will do all of the partitioning for you. Like Windows, you just set your location and other regional preferences, and away you go.
As far as use goes, for day to day use it's quite easy. Some aspects do take a bit of getting used to (being sure to properly mount and unmount drives to avoid data loss, for example), but it's not a huge deal. Beyond that there are plenty of helpful sites for new Ubuntu users where you can ask questions and get help from longtime users (linuxquestions.org is where I go).