You asked about files that can help you get into trance. This response provides a list. These are just a few of the induction files that are available for downloading.
Not long ago, I found nine files that had a member rating of 3.6 or better. The titles (in alphabetic order) are:
Blink's Basic Induction
Cardigan Deep trance
Cardigan Enhancement & Acceptance
Cardigan Gradual Induction
Elman Induction
Focus Induction
LR Induction 2
MN_FriendlyGuy - Short Induction
Seven Plus or Minus Two
The goal of these files is simply to put you into trance. Keep sampling until you find one that works for you. And remember that this is only a *partial* list
You also asked: "how will i know im in a trance?". It'll be easy for you to tell.
Think about what it's like as you fall asleep each night. There's a brief period between wakefulness and sleep. It's pleasant and and a little dream-like. You might be aware of a television that's been left on, but you're not consciously paying attention to it.
The best of luck to you! Please come back to your posting and let others know about your progress, okay?
I've recently been using Cardigan's Deep Trance, and it's worked very well for me, even though I've typically had a difficult time trancing. I highly recommend it.