RoR on IDE for Beginner

In my opinion, no. Others may disagree. At least start with no IDE
in order to understand the underlying commands. Once you have the
basics then you can try IDEs to see if they offer you any advantages.

My standard advice to beginners is to work right through a good
tutorial such as railstutorial.org, which is free to use online. Also
I recommend using Linux (eg Ubuntu) or Mac for development.

Colin