Here are some educational documents, listed in ascending order of complexity.
After these, see Lojban For Advanced Students.
For vocabulary, you can browse jbovlaste, a Lojban dictionary system.
There is also a PDF of the first 19 pages of the Level 0 booklet.
You can join the Lojban beginners' e-mail list and other Lojbanic Forums.
There is a Lojban-to-English translator at http://www.lojban.org/jboski/.
You could also try Parallel 2, a program for implicit learning of Lojban (and other languages). Modules developed for Parallel 2 are strongly influenced by What Is Lojban?.
Other Lojbanic Software.