When gluecille (Theresa) makes it back to the Crafts forum, I'm sure she'll be able to help you with which update is best.

I've been using Corel 7 for years and years, and recently asked gluecille which update she'd recommend, and there was one that I might like better, but she said some of the more recent ones are "all different" in that the shortcuts you have already learned don't work on the newer versions.

So, long story short, keep learning as much as you can, Cara, with Corel 3. There is a LOT to learn, even on 3, until you can talk with gluecille or someone else who has tried most of the later versions.