I just learned Ruby (and rails) about a year and a half ago. I found it incredibly easy to pick up. Coming from a PHP/Java background I found that most MVC based frameworks that I already knew are fashioned from Rails in some way.

I think if you're new to most server side languages and javascript SPA's are your wheelhouse your experience will be very foreign and dogmatic feeling. I switch between the two worlds often and am still amazed at how productive I am in ruby/rails.