First of all, welcome, second of all, get yourself access to the Beta forum, loads of help available there.
Problem 1: Using the 6DOF of TrackIR, I tend to look down first, then shift my view left, before rotating slightly (if need be); I have adjusted x and y movement (as opposed to rotation) to be slightly more sensitive. Try that.
Problem 2: Covered in Beta forum (where I believe this thread will be moved soon); you'll need to use the view zoom keys (physically moving forward with TrackIR won't work).
Problem 3: Check in-game training and again, Beta forums. Also, Nevada isn't available yet (was removed in Beta 3). Hope that helps. Tone (also from UK).