I think I'll go with green1's suggestion: I have somewhere in the house an older HDD (10 GB) which I hope it's still working. If so, I'll try several versions of Linux and...what will be will be!
Yet firebyrd10 put up a serious problem. Indeed, I see that Debian has 7 cds. If I think that I've spent three days downloading 1 iso (Knoppix), well, 7 isos would put my patiente to a challenge. Another way to do it would be buying the CDs from my local vendor. Yet I'm not decided with what should I go first. I hear Debian is great but it lacks a user-friendly installer and it's not designed for beginners; Mandrake is said to be good for beginners and has a good update system but it's not so powerful; SuSE would be "so and so" (some say it s*cks); RedHat seems to be nice yet I heard it has some problems regarding hardware support; Slackware is, I hear, definitely not for beginners, etc.

Why on Earth isn't there a board that would decide which is best for each segment of users? After all, we have "the most beautiful women in the world", we have the "Oscars" for movies, Emmy Awards, MTV Awards and so on...but no one knows which Linux is best?

And right now I'm also quite busy to afford myself spending 1-2 weeks for each verison (I think this would be the minimum amount of time in order to decide if you keep it or not).

But I see that here (and in many other places) are persons willing to help out the beginners...I hope there will be other suggestions as well.
Thanks to all of you who already gave their best to "enlight" a noob. Keep it up! (I think I will be the founder of the above mentioned board ).