Problem connecting new Oracle database in toad

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Oracle

Dear
I want to create new database and schema then connecting through toad.
I have followed this step,
tns configuration:

SMS_FL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = MIT-STA-03)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = bdmit)
    )
  )

then create table space:

CREATE BIGFILE TABLESPACE TBS_SMS_FL DATAFILE 'D:\oradata\TBS_SMS_FL.dbf' SIZE 256M
AUTOEXTEND ON NEXT 100M EXTENT MANAGEMENT LOCAL;

then create User:

CREATE USER SMS_FL101 IDENTIFIED BY SMS_FLl101 DEFAULT TABLESPACE TBS_SMS_FL QUOTA UNLIMITED ON TBS_sms_fl;
GRANT DBA TO SMS_FL101;

but problem is this ok,because I haven't got this database when toad login form May i miss something.I am confused.I am new in toad & oracle please guide me.
Mahmud