Hi,

First of all RoR isnt the absolute best programming language in the world. There isnt a best programming language in the world but there is language more suited to your needs !

Ruby on Rails as a Ruby Framework and Django as a Python framework are often praised to be good language to build a MVP. Because with RoR/Django you can build a product relatively quickly and easily.

If you want to learn how to develop, there is vibrant community for both of these frameworks and yes that is important if you want to start !

IMO: Choose your project then choose a language.