How can I find someone online to mentor me on my first research paper? I am an undergraduate student, and I have an idea which I want to explore and write a research paper on. But I am totally new to this.
I don't have good CS community at my place. 
So I can only look for a distant mentor.
Please tell me how and where (sites, forums) it is possible.
I would suggest taking to professors at your institution. If the semester is in session, you can go to their office hours; otherwise, you can email your advisor or another professor who knows you. Even if it's outside their area, they should be able to steer you in the right direction.