Yeah, hon I agree with cariad and Ed. THe risk is high in all you have mentioned. I would start out slow. there are threads here about self-bondage and some things you can try on your own, and they explain how to be safe doing these things.

Start slow and see what you like, but things like electro-play and water bondage can turn dangerous VERY quickly.

You are doing the right thing tho, asking questions. But YOUR safety should be the concern of YOU and anybody you play with.