ardvark71's suggestion to purchase a ready-made DVD is a good one, if all else fails.
I still think that the DIY solution will work using a few new DVDs and a decent burning program (in Windows) such as ImgBurn:
Use Mirror 7.
If you have access to a Linux machine then use Brasero or k3b.
Try several distros by testing live DVDs before you finally decide to install one.
If you don't wish to waste time burning several DVDs, then visit Linuxed
which has excellent reviews of many Linux distros, including plenty of screenshots:
I know you would like to use Ubuntu (nothing wrong with that) but do be aware that the Unity version's layout is unlike most of the other Ubuntus and non-Ubuntu distros.
Many Ubuntu users stopped using the distribution upon the arrival of Unity. Other Linux users prefer it. Unity is a bit like Marmite, you either love it or hate it.
Ubuntu Unity 13.04:
Two examples of more traditional layouts:
Linux Mint 17.1 MATE:
Ubuntu MATE 14.10:
Get that DVD burned!