I'm a noob as well. I have some HTML and other scripting language dev experience, but nothing like webOS development.
I recommend first understanding the structure of apps and taking the "Hello World" tutorial on developer.palm.com. The forums there also have good sources for tutorials and learning sites.
Also don't forget, there's lots of noobs in the "web OS Development" forum here at Precentral.net asking questions and getting help from experienced developers. The people there are second to none.
There are also a number of tutorial sites out there like webosschool.com. Most of the sites i have i got from these forums.
Hope this helps.