I've learned techniques to lucid dream, and I really want to try it. But I'm nervous about two things:
1): I'm scared I'll have a lucid nightmare. What would I do then? Also, what are the chances of having a lucid nightmare compared to a normal lucid dream?
2):How do I wake up if I get scared?



3):Whenever I don't want to think about something, naturally, I think about it. What if I think about something scary, will it be in my dream, or is it only when I really want it to happen?

4): Where does it "start"? Do you start in your bed, or where?
Please help, I'm scared but really want to LD.