Hi Sharki! Welcome to the forum!
Every beginner may have his own reason to be scared of LD’ing. That’s why I think it could be interesting to collect the different reasons in a “Too scared to LD” topic. So I’ll merge your topic into it.
Your fear is irrationnal as you suppose LD’ing is paranormal. It isn’t. It’s just dream plus consciousness. I suppose that when you’ll realize that, your fears will disappear.
About old hag: I said few posts above that very few people have old hag hallucinations. Either you have the sleep paralysis trouble, and you see old hag without even lucid dreaming ; or you don’t have the sleep paralysis trouble, and you’re likely to never have such strong hallucinations.
And about nightmares, you have to realize that nightmares are normal dreams. In a lucid dream, you have more chances to turn a nightmare into a pleasant dream. So that lucid dreaming is less frightening that normal dreams!