Hi Neehal,
You can take care of following steps -
1. After creation of back cube, add/remove characteristics under correct dimensions. Logical grouping of characteristics under dimensions helps in performance improvement also. Also you can choose if you want to save all char./Key figures or only selected few to be saved in cube.
2. After creation of data source, do ensure to replicate it too - it will then cop and activate the entire structure. You can also do consistency check (Check Data Source) to ensure its fine
3. Once all objects are created you can run each step to ensure data is passing to next step without any issue. For example, running Infopackage to see data is coming to PSA properly, then running DTP to ensure there is no error and so on. Once all steps are successful, you can see data via LISTCUBE in your cube.
Hope it helps.
Regards,
Alok