Ask HN: Resources for Learning CSS

http://learnlayout.com for positioning/layout

http://www.codecademy.com/ has some nice lessons in CSS, including positioning.

A Practical Guide to HMTL & CSS

I would suggest reviewing the beginner guide and then moving onto the advanced guide.

For reference, among others:

OP - I'd be willing to do lessons if we can work it out properly. Check out http://css-tricks.com/category/beginner/