Business page with cms

Hello,
I'm a beginner rails developer. I wanna do a business page for my friend. The task is to have a business page with cms to management a content, but in this cms admin user should have been able to generate raports from database which collect data from device and update database, load some image to little server. Which cms will be the best for this? I am thinking about activ_admin, it is very simple in management database. Maybe this connection may be not possible (managment page and database without public data from it on this page)?

Thanks for all answers and suggestions :)

I need your help with one of the issues I have been facing so far.

A good app

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thanks

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