Random Idea...

Hey all, it's been quite awhile since I've updated here, I've been pretty busy. (And lazy.) lol
Well, I've been wanting to write a book forever, whether it be children's, a novel, or inspirational...
But I've had no idea how to go about it, and no idea what to write about. ANyone have any ideas? I actually had an idea to write abook for people who are getting married young. Write a chapter on how to deal with family, how to deal with costs of the wedding, deal with life afterwards...
But my problem with that is that Terry and I aren't dealing with some of this stuff on our own.. so, I don't know~ Like I said, it's only an idea.
I've wanted to write a book since I was little..
The only Idea I have had, and only just tried to start is writing about a girl who finds herself pregnant, with a boyfriend who dumped her, raising her little brother, the only immediate family member survived out of a house fire. But for some reason, even though I think it could be good, I'm holding myself back on writing it.
Okay, I'm done rambling! Thanx ahead for your input!!