Hi John,
Was the Oracle installation done successfully? Don't create users manually and assign the permissions. Please use the SWPM to create users and groups. Please refer the guide for the procedure.
Also you must have done the oracle installation as per SAP guide suggested (means you should not use typical oracle installation tool OUI directly).
I would also recommend you to install Oracle first then go with SAP installation. Please check these and retry. hope this helps.
Thanks,
Pradeep