Well, you could always download a Live CD, like the
Kubuntu Live CD, and if you put the Live CD into your computer and reboot, you can see what Linux looks like and it doesn't do anything to your currently installed Operating System!
But, if you're completely sure that you want to erase your hard drive and put SUSE on it, then you could always do the "Text Installation" mode. That runs at a resolution of something like 640 x 480, so you should be fine with that. Text mode is not too scary, just make sure you choose the "Automatically Partition Hard Drive" option unless you have read up on manually partitioning the hard drive, because it can be quite confusing. Good luck, and welcome to LQ!
edit: ah..you solved it...welcome to LQ anyway!
J_K9