Local machine installation without FQDN and Error with starting up a local demo installation

Question

I am trying to set up a local machine to practice and downloaded the temporary key and met all the prerequisites. While following the instructions to make changes to the custom.properties.<ENVIRONMENT>, I don't find any FQDN as per the instructions, so I put in a loopback address 127.0.0.1:8080, and finished all the instructions. I ran the validation and deployment configuration as advised and they show successful, but when I try to start Appian using the instructions, I don't see a successful message - I see two Java windows open up (one is zookeeper and elastic search). What am I missing? Is this error due to the FQDN or some other attribute that I might have missed? Will appreciate help in this regards. 
 
 Thank you in advance

davinenig · Answer

Hi Aswin, 
 
Thank you for all the support extended so far, that was very helpful for me. I was able to resolve the issue by starting afresh. This time I named the Datasources in MySQL as Appian_Primary and Business_Primary and followed the instructions from the quick guide and that resolved the issue. I didn't modify any files in the original Appian directory, only the Repo files were changed and used the configure script. 
 
For someone if they encounter the same error - please follow the naming as per above. The quick start guide is little confusing at the datasource configuration stages. 
 
Regards