I think you pretty much answered it yourself, actually. You're just reluctant to try it because it's something new and you don't know how it'll be. I think the thing to do is just try not to make it such a big deal. You never really leave your body or anything like that- you're just aware during the transition from awake to dreaming. That's all it is. Once you try it it won't be such a big deal anymore, and you might well find it not scary at all, and you'll wonder why you even worried about it in the first place- a lot of new experiences tend to happen like that, for me anyway. And the very worst that can happen is that you'll find it kind of scary, and then you'll just fall asleep or wake up or whatever, and you'll look back and think, oh wow, I didn't like that too much. Just keep reminding yourself that that's the worst possible thing that will happen, and I'm sure everything will go fine.