Possible first timer

Never done any prostate massage or anything like that ( I did play around in my bum once though).

Anyway, I am considering getting an aneros or similar device for some solo play.

Sooo, any advice about what particular device would be good for a first timer? What kind of lube would be good to use (water based or silicone based or whatever. Is it even safe? I don’t want to risk any incontinence or something like that in the future.

Any other advice that I didn’t think to ask for is welcome 🙂