Hello!
I've been aware of this forum for a while, but decided join after i had my first lucid. My friend first had lucid dream and when he bought a notebook for his dream journal, he bought one for me and that's how it started.
Now after a month i had my first lucid and so, i decided to join this forum.
So everything i know about lucid dreaming, is what my friend has told me!

But there still is few things that troubles me

1: Sometimes when i go to sleep (usually when i've had only little bit of sleep during the week), i see this bright white flash! Could it be Hypnagogic hallucination, and would it be possible start lucid dream from one, and how?

2:I haven't seen any lucids before my first one, but in some dreams i have thought like "this shouldnt be like this" or something similar. Would it be possible to have a lucid dream from such a situation and how?

3:As i am interested in rail transportation, i have streetcars/trains in many of my dreams. (maybe in ½ of my dreams) Is it usual that one's interest's/hobbys is showing itself in a dream?

4:I've read from some book that dreams repeat the same message about one week. Is that true?