Please if someone can let me know if I could create table using Oracle 12c EM Express or also known as dbconsole? In 11g there user will go to schema -> db objects -> tables, but I don't see schema in 12C .
You can not do that in EM Express.
Although EM Express provides support for basic administrative tasks, it is not a direct replacement for DB Control. As explained in the Architecture section, EM Express is built inside the database server and cannot perform actions outside the database. Also, EM Express is focused primarily on providing performance management and monitoring functionality, and is not meant to be an all-around database administration tool.