@uLtRaTRim
believe me, the best way to learn is by doing. The best thing you can do is to get an template and examine the .css file. It will really help you out.
Why?
If you remove one tag, such as "background-color: red;" e.g. you will instantly learn what background-color actually does. Why not trying it yourself instead of reading all those tutorials?!
Okay, some tutorials might be good, such as the site which has been posted in this topic, but learning by doing is always great.
Regards,