first of all how is your relation with PL/SQL language ,it is important
i am researcher about oracle architecture ,backup structure and performance type ,
another job dba for me ,
if you like block code structure ,so you may become developer
another important thing if you want dba so you should search everything , you should read technical book.
İ know i wrote comment Hüsnü Şensoy blog
i cant give advice but only i say, you want make that job so you especially select that choice .