I bought a menstrual cup yesterday and I've been doing a lot of research about it. Anyway yesterday I tried to put it in and after a few tries I got it but it wont freaking pop open and I dont know what I'm doing wrong I've tried so many times and also sorry for the TMI but when I push I can literally see the stem of the cup coming out of me

Hellppp I really wanna use one cause I hate pads and tampons