Hi,
You just need to install the DB software, at Install DB software phase. All the other things(like user creation & setting ENV variables) will be taken care by SWPM itself.
It will again prompt you to perform restore(with oraSID) at Backup-Restore database phase. This is where you will have to restore the DB using BRTools with oraSID user.
The same has been described in the below link.
System copy - Backup/restore method
regards,
pavan