Hi there! I'm quite new to lifting at all, but there's lots of great women on this board who can offer alot of wisdom. Two resources that I've used to learn about "what to do, how to do it and how to eat to get the results" (whew!) are Body for Life, a book by Bill Phillips that seems to be widely available and Burn the Fat, Feed the Muscle by Tom Venuto (an e-book available on the web). Nutritional plan and eating is (I believe someone said) about 80% of your results.
I also noted you specified 'light weights' in your plan. Lean muscle (which burns off energy even when you're asleep - yay!) is much easier to build (according to what I've read and am working with) when you lift heavy and eat right. NOTE that 'heavy' is defined as 'what's heavy for you', not someone else. Right now, my 'heavy' is like 15lbs, but I'm sweating like a horse when I'm finished my reps. I look with envy at the logs of the gals lifting 90-200 lbs - I want to get there!
If you're worried about 'bulking up' - if you're female, it is actually sad how hard we have to work to add 'the look of being muscular'. You'll get firm (yay!) but to 'look bulky' - sorry, not likely to happen without (ahem . . ) 'pharmeceutical aids'.