you decide where you fit in. You have oracle knowlege. you check oracle 8i & its support fo java. how it supports jdbc ? how you can most of your knowledge ?
do you know the basic java ? if not then you have to start with that? then you can go for
jsp , servlets , jdbc stuff.
for mastering ejb books , you have to go to theserverside.com site & register there. then , you can download that book. it is about 8 mb & not printable.
i hope this is helpful.