OAuth, getting started? I have googled this, and I am a little lost.

First, let me begin by telling you I am new to web development.

I am actually somewhat of a veteran software engineer in C and C++. Web Development I am being thrown into the deep end with at the moment, and I am a little lost, so, apologies if some of my questions are a little stupid.

I have my rails environment setup, and I am able to see the initial welcome to rails page when I load it in the browser. Thats fine... But, the first thing I need this page to do is accept Oauth login functionality, via twitter. I can't use the twitter gem though, this has to be done using only the OAuth Gem.

I have through a bunch of tutorials, and all of them say I need to start with creating an instance of a consumer. By passing a configuration hash...

Where do I write the code for that though? on the default page of my application? or in a config file or something?

I am completely unfamiliar with the layout of anything in ruby on rails right now. I will go back and learn in greater detail, but for now I just need to get this up and running as quick as I can.