i wish you luck finding someone, because i know how good it feels to have a mentor. but if you don't: don't worry. you actually don't need a (single) mentor. the internet is your mentor.
i started learning rails 2-3 month ago, and because of its popularity their are tons of free resources, tons of people willing to help out on stackoverflow. almost every question i had, and typed into google, was already answered on a blog or on stackoverflow. and if you do have a very specific question, that is not already answered (i doubt it), i guarantee you, someone will answer, if you properly ask on stackoverflow.
good starting points are:
http://ruby.railstutorial.org/ruby-on-rails-tutorial-book
http://railscasts.com/
i would especially recommend working through the rails book. its not your typical programming book. its more like a really long, in-depth and well written tutorial. it took me two weeks (i skipped some of the chapters) to work through the book, and afterwards i really felt i knew enough to start working on my own project.
