Questions from a first timer.

Recently picked up an aneros helix but i’m kinda nervous to try it, and I had some questions.
1) Ive heard things about the prostate “buzzing” wondering how long this lasts, and if it happens when you dont have it in.
2) Also heard about some users reporting sleep problems due to the buzzing or involuntary shaking.
I want to experience new things and new pleasure, but i’m concerned about some of this stuff.