Hi

Not a advise but some points
Its very risky to offer a fresh person DBA sysadmin or network admin jobs.
Companies would be scared.There are some companies that are willing to take that risk as they cannot afford risks and thats how you need to make a entry.
You should be knowing Core DBA concepts before you become a Apps DBA.
As apps DBA adds the appserver and the application on top of oracle.

Whatever you do you try to do it with sincerity and hard work you will succed.

regards
Hrishy