I need help!

So I’ve done my research on menstrual cups. I decided to get the Venus high capacity cup because I do have a really heavy flow! I got it, boiled it then to tried to insert...I felt like a stuffed turkey tbh. It couldn’t fit. I tried the punch down,origami fold and the C fold. When I got it in, I immediately started to cramp(I got it in after legit 30 mins of trying...finally) I left it in just to see if the cramping would go away, it didn’t. So I pulled it out and when pulling it out I felt the worst pain of my life. I couldn’t get my finger in to break the seal so I just resorted to tugging it and that was a big mistake. I couldn’t even stick my finger in to make sure the cup was open I just hoped for the best and it opened which it did. I just need help because I really want to use a menstrual cup but the Venus cup just wasn’t comfortable to me. Any recommendations on folds or different cups? I need advice please!