The
documentation for WLS 8.1 has a number of tutorials and references. You can also go through the
J2EE tutorial, though it is based on the SunOne platform (there will be differences in some platform-specific tasks, the principles of the tutorial will be the same).
You may also want a
book to go with your tutorials (there's a free PDF download, but I prefer to have book in hand).
Writing web or ejb applications is non-trivial, so be prepared do do a lot of reading and coding.