Admin: Can I put a righthand nav on this template?

Sorry if this is a stupid question but I'm hoping I've got enough readers that somebody can help me. The template I'm using for this blog has no concept of a righthand gutter, and I'd like to add one. There's just not enough room down the left hand side, I don't want everybody to have to scroll infinitely if I want to put up a set of interesting links. Why can't I create a righthand sidebar just like the left? It's all CSS, which is not my strong suit :(. Should I use a different template? I couldn't find one that had gutters down both sides.

Thanks!