I got one that was labeled for "after you have a child" or whatever lol

I've tried using it off and on and watched some youtube videos.

Its almost always painful. I fold it up and insert it, and I can almost never get it to actually "suction." Like part of it stays kinda folded. I've tried using my finger to fix it or pulling it out a bit and its still a pain in the ass lol

I had it too deep the first couple times. I started pulling it out more. still causes some pain when it's in for more than 30 mins.

Help?