I think that the w3schools tutorials are very helpful for learning web designing because these provide the very good information regards the different topic of the web designing language.I hope this tutorial site is very helpful for you.
There are people who love w3schools and people who hate them.
My own recommendation - Go to the local library (if you can) or a good used bookstore and pick up a copy whichever 'beginning website design' book that fits your learning style. Then get some space to work and bookmark http://validator.w3.org/ to check your work.
If you get stuck, use Google to find clarification and remember to bookmark those sites - you'll be looking at the good ones over and over.