There is no shortcut to knowledge - do, fail, rinse and repeat, until you understand. Until you have installed, understood and successfully ran a rails app, tutorials are just next to useless. Apply apply and apply some more.
Follow this guide and <a href="http://guides.rubyonrails.org/getting_started.html" rel="nofollow">http://guides.rubyonrails.org/getting_started.html</a>, and don't slack.. Understand every line before you move on..