hello! I've never had a lucid dream before so I have some questions!

1.)I've heard people say not to look in mirrors in lucid dreams, because the image in the mirror might be scary. Is that true?

2.) Can you control EVERYTHING in lucid dreams? For example can you say that you want a celebrity you idolize to appear and they will?

3.) Which is the best dreaming method for beginners?

4.) If you look at a clock while lucid and look away, will it change?

Thank you for taking time to answer these! 