How does it work + which one to get?

Hey friends!

I’m relatively new to all of this, have experimented a little with prostate play before. I have gotten some very interesting and pleasurable feelings so far. One session it even felt like I had an orgasm building.

How do those aneros work? I first thought theres some little motor in them that massages the prostate or they vibrate. Turns out they dont have any motor and only a few of them vibrate. I’m confused! Do you constantly have to flex your pelvic muscles in order to make the massage happen?

I have a chronic condition and therefore my energy is limited. I always felt sore and tired in my arms and legs after using a dildo. Would the aneros even be any different or do you really have to work hard in order to make the massage happen?
I’m thinking about just getting the vibrating model first but then where do I go from there? I don’t want to start with the most intense one right away.

Any input, explanations or tips will be appreciated!