I would recommend to your sister to focus on DILD and DEILD for now, until she gets over her fear. The thing is, if she is scared of something, it's quite likely that she will see it, because dreams are directed by our thoughts. Fear will hinder her efforts, she should have happy, excited about LDing attitude.

DILD is when you practice RCs, awareness, mantras and write a dream journal. There are no hypnogogic hallucinations associated with DILD, because you go to sleep normally and you get lucid while in regular dream.

DEILD is a shortend WILD. It's what you did, when you wake up from a dream and then within seconds you enter another one, only this time lucid.

It's really nice to see you helping your sister. Good for you guys, that you have someone close to you that you can talk LDing with. Happy dreams