I have created trail WebCenter Cloud account with DBCS classic and JCS but in after that
not able unpack it as mentioned in the following steps :
sudo su oracle
But in my server box path /u02/d01 is not coming to unzip.
/u02/d01 is not coming to unzip.
I have tried unzipping it as logging as Oracle but then not able to copy those unzipped folders into OPC user .
It was time ago I played with Oracle WebCenter Portal Cloud trial and I do not remember having issues like you mentioned, it was quite straight forward.
If I have time I will try (maybe in the new WebCenter Portal Cloud releases something has changed), but I strongly recommend you contact Oracle to support your trial provisioning issue.